Document:

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                      RADNOR CORPORATE CENTER OFFICE LEASE

                                     BETWEEN

                            RADNOR CENTER ASSOCIATES
                      (a Pennsylvania limited partnership)

                                   AS LANDLORD

                                      -AND-

                              LASER PHOTONICS, INC.
                            (a Delaware corporation)

                                    AS TENANT

                         ==============================

                             DATED: _________, 2000

                                    PREMISES:

                           1,852 RENTABLE SQUARE FEET
                              4TH FLOOR - SUITE 470
                          FIVE RADNOR CORPORATE CENTER
                           RADNOR, PENNSYLVANIA 19087

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                             RADNOR CORPORATE CENTER
                                  OFFICE LEASE

         THIS OFFICE LEASE (the "Lease") is made this _____ day of
______________, 2000, by and between RADNOR CENTER ASSOCIATES, a Pennsylvania
limited partnership (hereinafter called "Landlord"), and LASER PHOTONICS, INC.,
a Delaware corporation (hereinafter called "Tenant").

         1.       DEMISED PREMISES; USE.

                  1.1. LETTING AND DEMISED PREMISES; USE. Landlord, for the term
and subject to the provisions and conditions hereof, leases to Tenant, and
Tenant rents from Landlord, the space (hereinafter referred to as the "Demised
Premises" and more particularly delineated on the floor plan attached hereto as
Exhibit "A" and made a part hereof) being, for purposes of the provisions hereof
1,852 rentable square feet, located on the 4th floor of the office building
(hereinafter referred to as the "Building") known as Building No. Five of Radnor
Corporate Center, or such other name as Landlord may from time to time
designate, with an address of 100 Matsonford Road, Radnor Township, Delaware
County, Pennsylvania 19087, located as shown on the Site Plan attached hereto as
Exhibit "B", to be used by Tenant only for general office purposes and
associated incidental uses and for no other purpose without the prior written
consent of Landlord.

                  1.2. CORPORATE CENTER. Radnor Corporate Center consists of
approximately 57.021 acres of ground and certain buildings and other
improvements thereon (including five separate office buildings, of which the
Building is one, and related amenities), all located at or about Matsonford Road
and King of Prussia Road, in Radnor Township, Delaware County, Pennsylvania (the
"Corporate Center"). Landlord reserves the right, in its sole discretion, at any
time and from time to time, to expand and/or reduce the amount of ground and/or
improvements of which the Corporate Center consists.

                  1.3. COMMON FACILITIES. Tenant and its agents, employees and
invitees, shall have the right to use, in common with all others granted such
rights by Landlord, in a proper and lawful manner, the common sidewalks, access
roads, parking areas and other outdoor areas within the Corporate Center, the
common entranceways, lobbies and elevators furnishing access to the Demised
Premises, and (if the Demised Premises includes less than a full floor) the
common lobbies, hallways and toilet rooms on the floor on which the Demised
Premises is located. Such use shall be subject to the terms of this Lease and to
such reasonable rules, regulations, limitations and requirements as Landlord may
from time to time prescribe with respect thereto, including, without limitation,
the reservation of any particular parking spaces or parking areas for the
exclusive use of other tenants of the Corporate Center.

                  1.4. RENTABLE SQUARE FEET. Tenant understands, acknowledges
and agrees (i) that the amount of rentable square feet set forth in Paragraph
1.1 above is calculated based on certain assumptions, and (ii) that such amount
of rentable square feet is hereby accepted by Tenant for all

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purposes of this Lease, including, without limitation, for purposes of
determining minimum rent, Tenant's Proportionate Share of applicable items of
Taxes and Operating Expenses, Tenant's construction allowance, if any, and
other items which are based upon the computation of square footage.

         2.   TERM; COMMENCEMENT.

                  2.1. DURATION. The term of this Lease shall commence (the
"Commencement Date") on April 1, 2000; or, if Landlord is responsible as
hereinafter provided for the completion of work in the Demised Premises and for
the completion of Tenant's fit-out work and other leasehold improvements
therein, then the Commencement Date shall be the earlier of the following: (i)
the later of (x) April 1, 2000, or (y) the date of "Substantial Completion", as
defined below, of the Demised Premises, or (ii) the date on which Tenant shall
take possession of the Demised Premises or any part thereof, or (iii) the date
on which Tenant could have taken possession of the Demised Premises had Tenant
not delayed in its obligations to furnish Landlord plans and other drawings
pursuant to Exhibit "F" attached hereto or otherwise caused a delay in the
Substantial Completion of the Demised Premises. Unless extended or sooner
terminated as herein provided, the initial term of this Lease shall continue
until, and shall expire on, the expiration of sixty (60) months following the
Commencement Date, or if the Commencement Date is a date other than the first
day of a month, then on the expiration of sixty (60) months from the first day
of the month following the month in which the Commencement Date occurs.

                  2.2. SUBSTANTIAL COMPLETION. The term "Substantial Completion"
shall mean that state of completion of the Demised Premises which will, except
for any improvements or work to be performed by Tenant, allow Tenant to utilize
the Demised Premises for their intended purposes (including the availability of
required utility services) without material interference to the customary
business activities of Tenant by reason of the completion of Landlord's work,
all as more fully described in Paragraph 17 below and Exhibit "F" attached
hereto. The Demised Premises shall be deemed substantially complete even though
minor or insubstantial details of construction, mechanical adjustment or
decoration remain to be performed, the noncompletion of which does not
materially interfere with Tenant's use of the Demised Premises or the conduct of
its business therein.

                  2.3. CONFIRMATION. When the Commencement Date of the term of
this Lease is established, Landlord and Tenant shall promptly execute and
acknowledge a Confirmation of Lease Term, in the form set forth in Exhibit "C"
hereto, containing the information set forth in Exhibit "C" and acknowledging
the Commencement Date and expiration date of the term hereof.

                  2.4. ACCEPTANCE OF WORK. On the Commencement Date of the term
of this Lease, it shall be presumed that all work theretofore performed by or on
behalf of Landlord was satisfactorily performed in accordance with, and meeting
the requirements of, this Lease. The foregoing presumption shall not apply,
however, (i) to required work not actually completed by Landlord and identified
and described in a written punch-list to be jointly prepared and initialed by
Landlord and Tenant at or about the date on which Tenant shall occupy the
Demised Premises; or (ii) to deficiencies or inadequacies in the work which
Tenant brings to Landlord's attention in writing, with

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specificity, on or before the Commencement Date or within ten (10) business
days thereafter (and all of the work so identified and described on the
punch-list or as timely brought to Landlord's attention as aforesaid which is
Landlord's responsibility shall be completed by Landlord with reasonable
speed and diligence).

          3.      MINIMUM RENT; INCREASES IN MINIMUM RENT; SECURITY DEPOSIT.

                  3.1.     AMOUNT AND PAYMENT.  Minimum rent for the Demised
Premises shall accrue during the term as follows:

<TABLE>
<CAPTION>
------------------------------ ---------------------------- --------------------------- ----------------------------

        LEASE PERIOD            ANNUAL RENT PER RENTABLE       ANNUAL MINIMUM RENT         MONTHLY MINIMUM RENT
                                       SQUARE FOOT
------------------------------ ---------------------------- --------------------------- ----------------------------
<S>                            <C>                          <C>                         <C>
Commencement Date - End of     $32.00                       $59,264.04                  $4,938.67
the Twelfth Full Calendar
Month following the
Commencement Date
------------------------------ ---------------------------- --------------------------- ----------------------------

Month 13-24                    $33.00                       $61,116.00                  $5,093.00
------------------------------ ---------------------------- --------------------------- ----------------------------

Month 25-36                    $34.00                       $62,967.96                  $5,247.33
------------------------------ ---------------------------- --------------------------- ----------------------------

Month 37-48                    $35.00                       $64,820.04                  $5,401.67
------------------------------ ---------------------------- --------------------------- ----------------------------

Month 49-60                    $36.00                       $66,672.00                  $5,556.00
------------------------------ ---------------------------- --------------------------- ----------------------------
</TABLE>

Minimum rent shall be payable during the term hereof, in advance, in the monthly
installments as set forth above, the first installment to be payable upon the
execution of this Lease and subsequent installments to be payable on the first
day of each successive month of the term hereof following the first month of
such term.

                  3.2. PARTIAL MONTH. If the term of this Lease begins on a day
other than the first day of a month, rent from such day until the first day of
the following month shall be prorated (at the rate of one-thirtieth (1/30) of
the fixed monthly rental for each day) and shall be payable, in arrears, on the
first day of the first full calendar month of the term hereof (and, in such
event, the installment of rent paid at execution hereof shall be applied to the
rent due for the first full calendar month of the term hereof).

                  3.3. ADDRESS FOR PAYMENT. All rent and other sums due to
Landlord hereunder shall be payable to Radnor Center Associates, c/o The
Rubenstein Company, L.P., 4100 One Commerce Square, 2005 Market Street,
Philadelphia, Pennsylvania 19103, or to such other party or at such other
address as Landlord may designate, from time to time, by written notice to
Tenant.

                  3.4. NON-WAIVER OF RIGHTS. If Landlord, at any time or times,
shall accept rent

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or any other sum due to it hereunder after the same shall become due and
payable, such acceptance shall not excuse delay upon subsequent occasions, or
constitute, or be construed as, a waiver of any of Landlord's rights
hereunder.

                  3.5. ADDITIONAL SUMS DUE; NO SET-OFF. All sums payable by
Tenant under this Lease, whether or not stated to be rent, minimum rent or
additional rent, shall be collectible by Landlord as rent, and upon default in
payment thereof Landlord shall have the same rights and remedies as for failure
to pay rent (without prejudice to any other right or remedy available therefor).
All minimum rent, additional rent and other sums payable by Tenant under this
Lease shall be paid, when due, without demand, offset, abatement, diminution or
reduction. Additional rent shall include all sums which may become due by reason
of Tenant's failure to comply with any of the terms, conditions and covenants of
the Lease to be kept and observed by Tenant and any and all damages, costs and
expenses (including without limitation thereto reasonable attorney fees) which
Landlord may suffer or incur by reason of any default of Tenant.

                  3.6. PERSONAL PROPERTY AND OTHER TAXES. As additional rent,
Tenant shall pay monthly or otherwise when due, whether collected by Landlord or
collected directly by the governmental agency assessing the same, any taxes
imposed or calculated on Tenant's rent or with respect to Tenant's use or
occupancy of the Demised Premises or Tenant's business or right to do business
in the Demised Premises, including, without limitation, a gross receipts tax or
sales tax on rents or a business privilege tax or use or occupancy tax, whether
such tax exists at the date of this Lease or is adopted hereafter during the
term of this Lease or during any renewal or extension thereof; but nothing
herein shall be taken to require Tenant to pay any income, estate, inheritance
or franchise tax imposed upon Landlord. In addition to the foregoing, Tenant
shall be responsible to pay when due all taxes imposed upon all personal
property of Tenant.

                  3.7. SECURITY DEPOSIT. As additional security for the full and
prompt performance by Tenant of the terms and covenants of this Lease, Tenant
has deposited with the Landlord the sum of Thirty Two Thousand One Hundred One
and 00/100 Dollars ($32,101.00), (the "Security Deposit") which shall not
constitute rent for any month (unless so applied by Landlord on account of
Tenant's default). Tenant shall, upon demand, restore any portion of the
Security Deposit which may be applied by Landlord to the cure of any default by
Tenant hereunder. To the extent that Landlord has not applied the Security
Deposit on account of a default, upon notice from Tenant, Eleven Thousand One
Hundred Twelve and 00/100 Dollars ($11,112.00) of the Security Deposit shall be
applied against minimum rent for months 59 and 60 and the remaining Security
Deposit shall be returned (without interest) to Tenant promptly after the
expiration of this Lease. Until returned to Tenant after the expiration of the
Lease and the full performance of Tenant hereunder, the Security Deposit shall
remain the property of Landlord.

         4.       INCREASES IN TAXES AND OPERATING EXPENSES.

                  4.1.     DEFINITIONS.  As used in this Paragraph 4, the
following terms shall be defined as hereinafter set forth:

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                           (i)      "TAXES" shall mean all real estate taxes and
assessments of whatever kind, general or special, ordinary or extraordinary,
foreseen or unforeseen, imposed upon the Building or with respect to the
ownership of the Building and the Corporate Center and the parcel of land on
which the Building and the Corporate Center are located, and any existing or
future improvements to the Building or the Corporate Center or to the parcel of
land on which the Building or the Corporate Center is located, all of the
foregoing as allocable and attributable to each given calendar year which occurs
during the term of this Lease (and any renewals and extensions thereof). If, due
to a future change in the method of taxation, any franchise, income, profit or
other tax, however designated, shall be levied or imposed in addition to or in
substitution, in whole or in part, for any tax which would otherwise be included
within the definition of Taxes, such other tax shall be deemed to be included
within Taxes as defined herein. Taxes also shall include amounts paid to anyone
engaged by Landlord to contest the amount or rate of taxes, provided that the
amounts so paid do not exceed the savings procured. Tenant acknowledges that the
exclusive right to protest, contest or appeal Taxes shall be in Landlord's sole
and absolute discretion and Tenant hereby waives any or all rights now or
hereafter conferred upon it by law to independently contest or appeal any Taxes.

                            (ii) (1) "OPERATING EXPENSES" shall mean Landlord's
actual out-of-pocket expenses, adjusted asset forth herein and as allocable and
attributable to each given calendar year which occurs during the term of this
Lease (and any renewals and extensions thereof), in respect of the operation,
maintenance, repair, replacement and management of the Building and the
Corporate Center (after deducting any reimbursement, discount, credit, reduction
or other allowance received by Landlord) and shall include, without limitation:
(A) wages and salaries (and taxes and insurance imposed upon employers with
respect to such wages and salaries) and fringe benefits paid to persons employed
by Landlord to render services in the normal operation, maintenance, cleaning,
repair and replacement of the Building and the Corporate Center and any security
personnel for the Building and the Corporate Center, excluding any overtime
wages or salaries paid for providing extra services exclusively for any specific
tenants; (B) costs of independent contractors hired for, and other costs in
connection with, the operation, security, maintenance, cleaning, repair and
replacement of the Building and related facilities and amenities in the
Corporate Center; (C) costs of materials, supplies and equipment (including
trucks) used in connection with the operation, security, maintenance, cleaning,
repair and replacement of the Building and related facilities and amenities in
the Corporate Center; (D) costs of electricity, steam, water, sewer, fuel and
other utilities used at the Building or the Corporate Center, together with the
cost of providing the services specified in Paragraph 5 hereof, to the extent
such utilities and/or services are not separately chargeable to an occupant of
the Building or an occupant elsewhere in the Corporate Center; (E) cost of
insurance for public and general liability insurance and insurance relating to
the Building and the Corporate Center, including fire and extended coverage or
"All-Risk" coverage, if available, and coverage for elevator, boiler, sprinkler
leakage, water damage, and property damage, plate glass, personal property owned
by Landlord, fixtures, and rent protection (all with such coverages and in such
amounts as Landlord may elect or be required to carry), but excluding any charge
for increased premiums due to acts or omissions of other occupants of the
Building or elsewhere in the Corporate Center because of extra risk which are
reimbursed to Landlord by such other occupants; (F) costs of

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tools, supplies and services; (G) costs of "Essential Capital Improvements",
as defined in and to the extent permitted pursuant to subparagraph 4.1(ii)(3)
below; (H) costs of alterations and improvements to the Building or the
Corporate Center made pursuant to any Governmental Requirements (as defined
in subparagraph 4.1(iii) below) which are not capital in nature (except to
the extent permitted by subparagraph 4.1(ii)(3) below), and which are not the
obligation of Tenant or any other occupant of the Building or elsewhere in
the Corporate Center; (I) legal and accounting fees and disbursements
necessarily incurred in connection with the ownership, maintenance and
operation of the Building and the Corporate Center, and the preparation,
determination and certification of bills for Taxes and Operating Expenses
pursuant to this and other leases at the Building and the Corporate Center;
(J) sales, use or excise taxes on supplies and services and on any of the
other items included in Operating Expenses; (K) costs of redecorating,
repainting, maintaining, repairing and replacing the common areas of the
Building and the Corporate Center (including seasonal decorations); (L)
management fees payable to the managing agent for the Building and the
Corporate Center (PROVIDED, HOWEVER, that if management fees are paid to any
affiliate of Landlord, then the amount thereof to be included in Operating
Expenses shall not exceed such amount as is customarily being charged for
similar services rendered to comparable buildings in the geographical
submarket within which the Corporate Center is located); (M) the cost of
telephone service, postage, office supplies, maintenance and repair of office
equipment and similar costs related to operation of the Building's and the
Corporate Center's management and superintendent's offices; (N) the cost of
licenses, permits and similar fees and charges related to operation,
maintenance, repair and replacement of the Building and the Corporate Center,
other than any of the foregoing relating to tenant improvements; and (O)
without limiting any of the foregoing, any other expenses or charges which,
in accordance with sound accounting and management principles generally
accepted with respect to a first-class suburban office building, would be
construed as an operating expense. Operating Expenses (including such as are
stated above which relate or are applicable to the Corporate Center) shall
include, without limitation, any and all sums for landscaping, ground and
sidewalk maintenance, sanitation control, extermination, cleaning, lighting,
snow removal, parking area and driveway striping and resurfacing, fire
protection, fire safety, policing, security systems, public liability and
property damage insurance, and expenses for the upkeep, maintenance, repair,
replacement and operation of the Corporate Center, all as payable in respect
of or allocable to the Building by virtue of the ownership thereof and/or
under and pursuant to the Declaration (as hereinafter defined). The term
"Operating Expenses" shall not include: (a) the cost of redecorating or
special cleaning or similar services to individual tenant spaces, not
provided on a regular basis to other tenants of the Building; (b) wages or
salaries paid to executive personnel of Landlord not providing full-time
service at the Corporate Center; (c) the cost of any new item (not
replacement or upgrading of an existing item) which, by standard accounting
principles, should be capitalized (except as provided above or in Paragraph
4.1(ii)(3) below); (d) any charge for depreciation or interest paid or
incurred by Landlord; (e) leasing commissions, finders fees and all other
leasing expenses incurred in procuring tenants in the Building; (f) Taxes;
(g) any costs incurred in the ownership of the Building, as opposed to the
operation and maintenance of the Building, including Landlord's income taxes,
excess profit taxes, franchise taxes or similar taxes on Landlord's business;
preparation of income tax returns; corporation, partnership or other business
form organizational expenses; franchise taxes; filing fees; or other such
expenses; or any costs incurred in cleaning up any environment hazard or
condition in violation of any environmental law (except to the extent caused
by Tenant); (h) legal

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fees for the negotiation or enforcement of leases; (i) expenses in connection
with services or other benefits of a type which are not Building standard but
which are provided to another tenant or occupant; (j) any items to the extent
such items are required to be reimbursed to Landlord by Tenant (other than
through Tenant's additional rent), or by other tenants or occupants of the
Building or by third parties; (k) depreciation, except in the form of a
"sinking fund" for periodic replacement of carpeting and for periodic
repainting (both in common areas only); or interest paid on any mortgage, or
ground rents paid under land leases, except for payment of any triple-net
expenses required by such leases; (l) the cost of constructing tenant
improvements or installations for any tenant in the Building, including any
relocation costs; (m) brokerage commissions, origination fees, points,
mortgage recording taxes, title charges and other costs or fees incurred in
connection with any financing or refinancing of the Building; (n) attorneys'
fees and disbursements, incurred in connection with the leasing of space in
the Building (including without limitation the enforcement of any lease or
the surrender, termination or modification of any lease of space in the
Building); (o) advertising and promotional expenses, brochures with respect
to the Building; (p) cost of repairs or replacements occasioned by fire,
windstorm or other casualty, the costs of which are covered by insurance or
reimbursed by governmental authorities in eminent domain; (q) overhead and
profit increment paid to subsidiaries or affiliates of Landlord for services
on or to the Property, to the extent that the costs of such services exceed
market-based costs for such services rendered by unaffiliated persons or
entities of similar skill, competence and experience; (r) penalties, fines,
legal expenses, or late payment interest incurred by Landlord due to
violation by Landlord, or Landlord's agents, contractors or employees, of
either the payment terms and conditions of any lease or service contract
covering space in the Building or Landlord's obligations as owner of the
Building (such as late payment penalties and interest on real estate taxes,
late payment of utility bills); (s) any compensation paid to clerks,
attendants or other persons in any commercial concession operated by Landlord
in the Building from which Landlord receives any form of income whatsoever,
whether or not Landlord actually makes a profit from such concession; or (t)
costs incurred in connection with correcting latent defects in the Building,
or in repairing or replacing Building equipment, where such repair or
replacement results from original defects in design, manufacture or
installation rather than from ordinary wear and tear or use. If Landlord is
not furnishing any particular work or service (the cost of which, if
performed by Landlord, would constitute an Operating Expense) to a tenant who
has undertaken to perform such work or service in lieu of performance by
Landlord, Operating Expenses shall nevertheless be deemed to include the
amount Landlord would reasonably have incurred if Landlord had in fact
performed the work or service at its expense. The costs of electric
consumption and water, sewer and other utility services to the Demised
Premises (including, without limitation, for HVAC usage) are not included as
Operating Expenses of the Building and shall be paid for by Tenant separately
in accordance with Paragraph 5 of this Lease. Notwithstanding the foregoing,
in the event the Landlord now, or in the future, employs oil or gas to
partially fuel the HVAC at the Building, the cost of such oil or gas shall be
included in Operating Expenses.

                                    (2)     In  determining  Operating  Expenses
for any year, if less than 95% of the rentable square feet of the Building shall
have been occupied by tenants at any time during such year, Operating Expenses
shall be deemed for such year to be an amount equal to the like expenses which
Landlord reasonably determines would normally be incurred had such occupancy
been 95% throughout such year. In no event shall the total of Taxes and
Operating Expenses for any

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year be deemed to be less than the Base Amount for Taxes and Operating
Expenses.

                                    (3) In the event Landlord shall make a
capital expenditure for an "Essential Capital Improvement", as hereinafter
defined in this subsection (3), during any year, the annual amortization of such
expenditure (determined by dividing the amount of the expenditure by the useful
life of the improvement, but in no event longer than five years), plus any
reasonable interest or financing charges thereon (or, if such improvements are
funded from reserves, a reasonable sum imputed in lieu of such financing
charges), shall be deemed an Operating Expense for each year of such period. As
used herein, an "Essential Capital Improvement" means any of the following: (A)
a labor saving device, energy saving device or other installation, improvement,
upgrading or replacement which reduces or is intended to reduce Operating
Expenses as referred to above, whether or not voluntary or a Governmental
Requirement; or (B) an installation, improvement, alteration or removal of any
improvements including architectural or communication barriers which are made to
the Building by reason of any Governmental Requirement whether or not such
improvements are structural in nature and whether or not such Governmental
Requirement either existed or was required of the Landlord on the date of
execution of this Lease, if such Governmental Requirement is or will be
applicable generally to similar suburban office buildings in the vicinity of
Radnor Township; or (C) an installation or improvement which directly enhances
the safety of occupants or tenants in the Building generally, whether or not
voluntary or a Governmental Requirement (as, for example, but without
limitation, for general safety, fire safety or security).

                           (iii) "GOVERNMENTAL REQUIREMENTS" shall mean all
requirements under any federal, state or local statutes, rules, regulations,
ordinances, or other requirements of any duly constituted public authority
having jurisdiction over the Building (including, without limitation, the
Demised Premises) including, but not limited to, requirements under applicable
Radnor Township building, zoning and fire codes and federal, state and local
requirements and regulations governing accessibility by persons with physical
disabilities.

                           (iv) "BASE AMOUNT FOR TAXES AND OPERATING EXPENSES"
shall mean the total of Taxes and Operating Expenses allocable and attributable
to calendar year 2000 for the Building. The Base Amount for Operating Expenses
shall be calculated on the basis of the Building being 95% occupied in
accordance with Paragraph 4.1(ii)(2) hereof. The Base Amount for Taxes and
Operating Expenses shall be adjusted for the calendar year above stated to
adjust for average and reasonable allowances for on-going repairs and
maintenance and to exclude from the Base Amount extraordinary items of Taxes
and/or Operating Expenses incurred in such calendar year.

                           (v) "TENANT'S PROPORTIONATE SHARE" shall be one and
1,253\10,000 percent (1.1253%). This is equal to the ratio of the rentable
square feet of the Demised Premises, as set forth above, to the total rentable
square feet of space in the Building, which is 164,577 rentable square feet.

                           (vi) "TENANT'S SHARE OF TAXES AND OPERATING EXPENSES"
shall mean, with respect to any calendar year, the product of (A) Tenant's
Proportionate Share, multiplied by, (B) the amount, if any, by which the total
of Taxes and Operating Expenses for such calendar year exceeds

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the Base Amount for Taxes and Operating Expenses.

                           (vii) "TENANT'S ESTIMATED SHARE" shall mean, with
respect to any calendar year, the product of (A) Tenant's Proportionate Share,
multiplied by (B) the amount, if any, by which Landlord's good faith estimate of
the total of Taxes and Operating Expenses for such calendar year exceeds the
Base Amount for Taxes and Operating Expenses.

                           (viii)   "DECLARATION" shall mean the Declaration of
Radnor Corporate Center Covenants, Restrictions and Easements, together with all
existing or future amendments, addenda and supplements thereto, executed by
Landlord (or Landlord's predecessor in title to the Corporate Center) and placed
of record, submitting the Corporate Center or portion thereof to a system of
reciprocal easements, restrictions, benefits and burdens for the use and
maintenance thereof by owners and tenants, and to which all such owners and
tenants shall be subject.

                  4.2.     GENERAL ALLOCATION PROCEDURES.  Landlord and Tenant
acknowledge the following:

                           (i)      To the extent practicable and known
exactly, all Taxes and Operating Expenses will be accounted for and attributed
separately for the Building and for the four other office buildings which
presently comprise the Corporate Center (the "Other Corporate Center
Buildings"). To the extent allocations of an item of Taxes or Operating Expenses
in accordance with the foregoing sentence is not practicable and known exactly,
allocations will be made between and among the Building and the Other Corporate
Center Buildings proportionately among all thereof (based upon the respective
square footage of each), or equally among all thereof, or in such other
proportions as may reasonably be determined by Landlord in the exercise of
prudent management practices.

                           (ii) Notwithstanding the foregoing, and to the extent
deemed reasonable by Landlord, all common area and other charges under and as
permitted by the Declaration will be charged and allocated among the Building,
the Other Corporate Center Buildings, and any other building, facility or
property subject to the Declaration, all in accordance with the terms and
provisions of the Declaration.

                  4.3.     TENANT'S SHARE OF TAXES AND OPERATING EXPENSES.

                           (i) For and with respect to each calendar year which
occurs during the term of this Lease (and any
renewals or extensions thereof) there shall accrue, as additional rent, Tenant's
Share of Taxes and Operating Expenses, appropriately prorated for any partial
calendar year occurring within the term.

                           (ii)     Landlord  shall  furnish to Tenant,  on or
before December 31 of each calendar year during the term hereof, a statement for
the next succeeding calendar year setting forth Tenant's Estimated Share and the
information on which such estimate is based. On the first day of the new
calendar year, Tenant shall pay to Landlord, on account of Tenant's Estimated
Share, an amount equal to one-twelfth (1/12) of Tenant's Estimated Share, and on
the first day of each succeeding

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month up to and including the time that Tenant shall receive a new statement
of Tenant's Estimated Share, Tenant shall pay to Landlord, on account of
Tenant's Estimated Share, an amount equal to one-twelfth (1/12) of the then
applicable Tenant's Estimated Share.

                           (iii)    Landlord  shall  furnish to Tenant,  on or
before April 30 of each calendar year during the term hereof, a statement (the
"Expense Statement") prepared by Landlord or its agent or accountants setting
forth for the previous calendar year: (A) the actual amount of Taxes and
Operating Expenses for the previous calendar year; (B) the Base Amount for Taxes
and Operating Expenses; (C) the Tenant's Proportionate Share; (D) the Tenant's
Share of Taxes and Operating Expenses; (E) the Tenant's Estimated Share; and (F)
a statement of the amount due to Landlord, or to be credited to Tenant, as a
final adjustment in respect of Tenant's Share of Taxes and Operating Expenses
for the previous calendar year (the "Final Adjustment Amount"). The Final
Adjustment Amount shall be calculated by subtracting the Tenant's Estimated
Share from the Tenant's Share of Taxes and Operating Expenses. On the first day
of the first calendar month (but in no event sooner than ten [10] days)
following delivery of the Expense Statement to Tenant, Tenant shall pay to
Landlord the Final Adjustment Amount calculated as set forth in the Expense
Statement. If the Final Adjustment Amount is a negative quantity, then Landlord
shall credit Tenant with the amount thereof against the next payment of minimum
rent due by Tenant hereunder, except that with respect to the last year of the
Lease, if an Event of Default has not occurred, Landlord shall refund Tenant the
amount of such payment in respect of the Final Expense Adjustment within thirty
(30) days after Landlord provides the Expense Statement for such final year of
the Lease. In no event, however, shall Tenant be entitled to receive a credit
greater than the payments made by Tenant as payments of Tenant's Estimated Share
for the calendar year to which the Final Adjustment Amount relates.

                  4.4 DISPUTES. The information set forth on all statements
furnished to Tenant pursuant to this Paragraph 4, including each Expense
Statement, and all documents relating to Tenant's Estimated Share, Tenant's
Share of Taxes and Operating Expenses, the Final Adjustment Amount, and all
supportive documentation and calculations, shall be deemed approved by Tenant
unless, within thirty (30) days after submission to Tenant, Tenant shall notify
Landlord in writing that it disputes the correctness thereof, specifying in
detail the basis for such assertion. Pending the resolution of any dispute,
however, Tenant shall continue to make payments in accordance with the statement
or information as furnished.

                  4.5. SURVIVAL. Notwithstanding anything herein contained to
the contrary, Tenant understands and agrees that additional rent for increases
of Taxes and Operating Expenses described in this Paragraph 4 are attributable
to and owing for a specific twelve (12) month period, and are generally
determined in arrears. Accordingly, Tenant agrees that, at any time following
the expiration of the term of this Lease, or after default by Tenant with
respect to this Lease, Landlord may bill Tenant for (i) the entire amount of
accrued and uncollected additional rent attributable to increases in Taxes and
Operating Expenses under this Paragraph 4, and (ii) any unpaid charges for
usage, services or other amounts with respect to any period during the term of
this Lease; and the amount of such bill shall be due and payable to Landlord
within ten (10) business days after rendering thereof.

         5. SERVICES. Landlord agrees that during the term of the Lease,
Landlord shall provide

                                     10
<PAGE>

services as set forth in this Paragraph 5.

                  5.1. HVAC AND ELECTRICITY . Landlord shall furnish (a) heat,
ventilation and air conditioning (including the labor, maintenance and equipment
necessary to provide the same), (b) electricity and other utilities needed to
operate such systems and (c) electricity for lighting and general power for
office use, each of the foregoing to be paid for by Tenant as follows:

                           (i)      STANDARD  USAGE;  BUSINESS  HOURS.  Tenant
shall pay its pro rata share (based upon Tenant's Proportionate Share, but
subject to the last sentence of this subparagraph) of the cost to the Building
(including applicable sales or use taxes) for the foregoing services during
"Business Hours" (as hereinafter defined) and for "Building Standard
Consumption" (as hereinafter defined). Such payment shall be made by Tenant
within ten (10) days after submission by Landlord of a statement to Tenant
setting forth the amount due. "Business Hours" shall mean Monday through Friday
from 8:00 a.m. to 6:00 p.m. and on Saturday from 8:00 a.m. to 1:00 p.m.,
Holidays (defined below) excepted. New Year's Day, Memorial Day, Independence
Day, Labor Day, Thanksgiving, Christmas, or any day set aside to celebrate such
holidays are "Holidays" under this Lease. "Building Standard Consumption" shall
mean the consumption necessary, in Landlord's reasonable judgement, for use and
comfortable occupancy of the Demised Premises when occupied by the density of
people for which the building standard system was designed with occupants using
Standard Office Equipment. "Standard Office Equipment" shall mean all office
equipment normally found in an office facility but shall not include "main
frame" computer and communication systems, telephone switches and conference or
training rooms (or items similar thereto) which require Additional Electric
Equipment, as hereinafter defined in Paragraph 5.1(v) below, or additional air
conditioning service or systems. In determining Tenant's pro rata share for the
foregoing services for any period, the cost for the foregoing services shall be
deemed for such period to be an amount equal to the like expenses which Landlord
reasonably determines would normally be incurred had the Building been fully
occupied throughout such period.

                           (ii) NON-STANDARD  USAGE;  AFTER-HOURS.  Tenant shall
pay the cost of supplying the Demised Premises with the foregoing services at
times outside of Business Hours or in amounts in excess of Building Standard
Consumption, at such rates as Landlord shall specify from time to time to cover
all of the estimated costs and expenses incurred by Landlord in connection with
supplying the Demised Premises with such service, including without limitation
the costs of labor and utilities associated with such service and including
applicable sales or use taxes thereon, such amounts to be paid by Tenant within
ten (10) days after submission by Landlord of a statement to Tenant setting
forth the amount due. With respect to heat, ventilation and air conditioning
required by Tenant outside of Business Hours, Tenant shall notify Landlord by
12:00 noon on the day such after-hours use is desired, except if such use is
desired for a weekend, in which event Tenant shall notify Landlord no later than
12:00 noon on the Friday immediately preceding such weekend.

                           (iii)  SEPARATE  METERING;  SURVEY.  Landlord
reserves the right, at Tenant's sole cost, to determine Tenant's charge for
electrical usage by separate meter or electrical engineering survey. At any time
after the installation of separate metering for the Demised Premises (or any
part thereof), or the completion of such survey, Landlord shall furnish to
Tenant a statement setting forth the amount due for Tenant's electric usage (or
the part thereof that is so metered or subject to such

                                     11
<PAGE>

survey), and the total amount set forth in such statement shall be due and
payable by Tenant within ten (10) days after submission to Tenant by Landlord
of such statement. In such case, Tenant shall pay for such consumption based
upon the average KWH rate paid by Landlord.

                           (iv)  SYSTEM  FAILURE.  Landlord  shall not be
responsible for any failure or inadequacy of the air conditioning system if such
failure or inadequacy results from the occupancy of the Demised Premises by
persons in excess of the density anticipated or for which the system was
designed, or if Tenant uses the Demised Premises in a manner for which it was
not designed, or if Tenant installs or operates machines, appliances or
equipment which exceed the maximum wattage per square foot contemplated by, or
generate more heat than anticipated in, the design of the Demised Premises (as
such design standards may be set forth in Exhibit "F" attached hereto or
otherwise established by Landlord if not so set forth).

                           (v)   ADDITIONAL  ELECTRICAL  EQUIPMENT.   Tenant
will not install or use electrically-operated equipment in excess of the design
capacity of the Demised Premises (as such design standards may be set forth in
Exhibit "F" attached hereto or otherwise established by Landlord if not so set
forth) and Tenant will not install or operate in the Demised Premises any
electrically-operated equipment or machinery other than that commonly used in a
normal office operation without first obtaining the prior written consent of the
Landlord. Landlord may condition any consent required under this Paragraph
5.1(v) upon the installation of separate meters (and transformers or electrical
panels) for such equipment or machinery at Tenant's expense and the payment by
Tenant of additional rent as compensation for the additional consumption of
electricity occasioned by the operation of such additional equipment or
machinery, at the rates and in the manner set forth in Paragraph 5.1(ii) or
(iii) above. Landlord shall replace, when and as requested by Tenant (the cost
of which replacement light bulbs and tubes, and ballasts, plus the labor cost
for such replacement, to be chargeable to Tenant) light bulbs and tubes, and
ballasts, within the Demised Premises which are Building standard (but at
Landlord's option such undertaking of Landlord shall not include bulbs or tubes
for any non-Building standard lighting, high hats, or other specialty lighting
of Tenant, which shall be and remain the responsibility of Tenant).

                           (vi) REGULATORY COMPLIANCE.  The furnishing of the
foregoing heating, ventilation, air conditioning and electricity services shall
be subject to any statute, ordinance, rule, regulation, resolution or
recommendation for energy conservation which may be promulgated by any
governmental agency or organization which Landlord shall be required to comply
with or which Landlord determines in good faith to comply with.

                  5.2. WATER AND SEWER. Furnish the Building with water (i) for
drinking, lavatory, toilet and sanitary sewer purposes drawn through fixtures
installed by Landlord, (ii) necessary for the operation of the Building's fire
safety devices, and (iii) if required by the Building's HVAC system, necessary
for the operation of such system. The cost of usage of such services
attributable to the Demised Premises shall be paid for by Tenant pursuant to a
statement furnished by Landlord to Tenant setting forth the amount due as a
result of such usage attributable to the Demised Premises, and the total amount
set forth in such statement shall be due and payable by Tenant within ten (10)
days after submission thereto by Landlord of such statement.

                                     12
<PAGE>

                  5.3. ELEVATOR; ACCESS. Provide passenger elevator service to
the Demised Premises during all working days (Saturday, Sunday and Holidays
excepted) from 8:00 a.m. to 6:00 p.m., with one elevator subject to call at all
other times. Tenant and its employees and agents shall have access to the
Demised Premises at all times, subject to compliance with such security measures
as shall be in effect for the Building. Elevator services for freight shall be
supplied in common with service to other tenants and for other Building
requirements at reasonable times during Business Hours for routine deliveries in
the ordinary course of Tenant's business. Unusual or unusually large deliveries
requiring use of the freight elevators shall be scheduled in advance with
Landlord so as not to interfere with the operations of the Building or other
tenants. Freight elevator service outside of Business Hours shall be provided to
Tenant upon reasonable written advance notice, at charges equal to Landlord's
estimated cost for providing such service from time to time, which shall be
payable by Tenant to Landlord not later than ten (10) days after Landlord's bill
therefor.

                  5.4. JANITORIAL. Provide janitorial service to the Demised
Premises as specified on Exhibit "D" annexed hereto. Any and all additional or
specialized janitorial or trash removal service desired by Tenant (i) shall be
contracted for by Tenant directly with Landlord's janitorial agent and the cost
and payment thereof shall be and remain the sole responsibility of Tenant, or
(ii) at the option of Landlord, shall be contracted for by Landlord and paid for
by Tenant to Landlord within ten (10) days after the submission by Landlord of a
statement to Tenant setting forth the amount due. If Landlord shall from time to
time reasonably determine that the use of any cleaning service in the Demised
Premises, including without limitation, removal of refuse and rubbish from the
Demised Premises, is in an amount greater than usually attendant upon the use of
such Demised Premises as offices, the reasonable cost of such additional
cleaning services shall be paid by Tenant to Landlord as additional rent, on
demand.

                  5.5. SECURITY. Landlord provides a security card or code type
access system at the main entrance to the Building for Tenant's convenience.
Tenant and Tenant's employees, as well as other tenants of the Building, will
have access to the Building using such access system. Landlord makes no
representation that the access system or any future system employed at the
Building to monitor access to the Building outside of standard business hours
will prevent unauthorized access to the Building or the Demised Premises, and
Tenant acknowledges that no security guards are provided by Landlord.
Accordingly, Tenant agrees that Tenant shall be responsible for security of the
Demised Premises and the security and safety of Tenant's employees, invitees,
officers, directors, contractors, subcontractors and agents. In furtherance of
the foregoing, Landlord assumes no liability or responsibility for Tenant's
personal property whether such are located in the Demised Premises or elsewhere
in the Building or the Corporate Center. Tenant further acknowledges that
Landlord may (but shall have no obligation to) alter current security measures
in the Building, and Tenant agrees that it shall cooperate fully, and shall
cause its employees and invitees to cooperate fully, with any requests of
Landlord in connection with the implementation of any new security procedures or
other arrangements.

                  5.6. REPAIRS. Make (i) all structural repairs to the Building,
(ii) all repairs to the exterior windows and glass and all repairs to the common
areas of the Building and (iii) all repairs which may be needed to the
mechanical, electrical and plumbing systems in the Demised Premises,

                                    13
<PAGE>

excluding repairs to (or replacement of) any non-building standard fixtures
or other improvements in the Demised Premises installed by Tenant or made by
or at the request of Tenant and requiring unusual or special maintenance. In
the event that any repair is required by reason of the negligence or abuse of
Tenant or its agents, employees, invitees or of any other person using the
Demised Premises with Tenant's consent, express or implied, Landlord may make
such repair and add the cost thereof to the first installment of rent which
will thereafter become due, unless Landlord shall have actually recovered
such cost through insurance proceeds.

                  5.7. SYSTEM CHANGES. Tenant shall not install any equipment of
any kind or nature whatsoever which would or might necessitate any changes,
replacement or additions to the water, plumbing, heating, air conditioning or
the electrical systems servicing the Demised Premises or any other portion of
the Building; nor install any plumbing fixtures in the Demised Premises; nor use
in excess of normal office use any of the utilities, the common areas of the
Building, the janitorial or trash removal services, or any other services or
portions of the Building without the prior written consent of the Landlord, and
in the event such consent is granted, the cost of any such installation,
replacements, changes, additions or excessive use shall be paid for by Tenant,
in advance in the case of any installations replacements and additions, and
promptly upon being billed therefor in the case of charges in excessive use.

                  5.8. DIRECTORY. Landlord shall maintain a directory of office
tenants in the lobby area of the Building, on which shall be listed the name of
Tenant. In the event Landlord permits Tenant to add more names to the directory
(which Landlord may grant or deny in its sole discretion), Tenant shall pay the
actual cost of lobby directory signage over an allowance of one (1) directory
space per Tenant.

                  5.9. OVERHEAD FEE. Notwithstanding anything to the contrary
contained in this Paragraph 5, Landlord reserves the right to impose a
reasonable administrative overhead charge whenever Landlord provides or arranges
for additional or above standard services.

                  5.10. LIMITATION REGARDING SERVICES. It is understood that
Landlord does not warrant that any of the services referred to in this Paragraph
5 will be free from interruption from causes beyond the control of Landlord.
Landlord reserves the right, without any liability to Tenant, and without being
in breach of any covenant of this Lease, to interrupt or suspend service of any
of the heating, ventilating, air-conditioning, electric, sanitary, elevator or
other Building systems serving the Demised Premises, or the providing of any of
the other services required of Landlord under this Lease, whenever and for so
long as may be necessary by reason of accidents, emergencies, strikes or the
making of repairs or changes which Landlord is required by this Lease or by law
to make or in good faith deems advisable, or by reason of difficulty in securing
proper supplies of fuel, steam, water, electricity, labor or supplies, or by
reason of any other cause beyond Landlord's reasonable control, including
without limitation, mechanical failure and governmental restrictions on the use
of materials or the use of any of the Building systems. In each instance,
however, Landlord shall exercise commercially reasonable diligence to eliminate
the cause of interruption and to effect restoration of service, and shall give
Tenant reasonable notice, when practicable, of the commencement and anticipated
duration of such interruption. Tenant shall not be entitled to any diminution or
abatement of rent or other compensation nor shall this Lease or any of the
obligations

                                     14
<PAGE>

of the Tenant be affected or reduced by reason of the interruption, stoppage
or suspension of any of the Building systems or services arising out of the
causes set forth in this Paragraph.

         6. CARE OF DEMISED PREMISES. Tenant agrees, on behalf of itself, its
employees and agents, that during the term of this Lease, Tenant shall comply
with the covenants and conditions set forth in this Paragraph 6.

                  6.1. INSURANCE AND GOVERNMENTAL REQUIREMENTS. At all times
during the term of this Lease and any extension or renewal hereof, Tenant, at
its cost, shall comply with, and shall promptly correct any violations of, (i)
all requirements of any insurance underwriters, or (ii) any Governmental
Requirements relating to Tenant's use and occupancy of the Demised Premises.
Tenant shall indemnify, defend and hold Landlord harmless from and against any
and all loss, damages, claims of third parties, cost of correction, expenses
(including attorney's fees and cost of suit or administrative proceedings) or
fines arising out of or in connection with Tenant's failure to comply with
Governmental Requirements. The provisions of this Paragraph 6.1 shall survive
the expiration or termination of this Lease.

                  6.2. ACCESS. Tenant shall give Landlord, its agents and
employees, access to the Demised Premises at all reasonable times, and at any
time in the case of an emergency, without charge or diminution of rent, to
enable Landlord (i) to examine the same and to make such repairs, additions and
alterations as Landlord may be permitted to make hereunder or as Landlord may
deem advisable for the preservation of the integrity, safety and good order of
the Building or any part thereof; and (ii) upon reasonable notice, to show the
Demised Premises to prospective mortgagees and purchasers and to prospective
tenants. If representatives of Tenant shall not be present on the Demised
Premises to permit entry upon the Demised Premises by Landlord or its agents or
employees, at any time when such entry by Landlord is necessary or permitted
hereunder, Landlord may enter the Demised Premises by means of a master key (or,
in the event of any emergency, forcibly) without any liability whatsoever to
Tenant and without such entry constituting an eviction of Tenant or a
termination of this Lease. Landlord shall not be liable by reason of any injury
to or interference with Tenant or Tenant's business arising from the making of
any repairs, alterations, additions or improvements in or to the Demised
Premises or the Building or to any appurtenance or any equipment therein.

                  6.3. CONDITION. Tenant shall keep the Demised Premises and all
improvements, installations and systems therein in good order and condition and
repair all damage to the Demised Premises and replace all interior glass broken
by Tenant, its agents, employees or invitees, with glass of the same quality as
that broken, except for glass broken by fire and extended coverage type risks,
and Tenant shall commit no waste in the Demised Premises. If the Tenant refuses
or neglects to make such repairs, or fails to diligently prosecute the same to
completion, after written notice from Landlord of the need therefor, Landlord
may make such repairs at the expense of Tenant and such expense shall be
collectible as additional rent. Any such repairs and any labor performed or
materials furnished in, on or about the Demised Premises shall be performed and
furnished by Tenant in strict compliance with all applicable laws, regulations,
ordinances and requirements of all duly constituted authorities or governmental
bodies having jurisdiction over the Building, and any reasonable regulations
imposed by Landlord pertaining thereto. Without limitation of the foregoing,
Landlord

                                     15
<PAGE>

shall have the right to designate any and all contractors and suppliers to
furnish materials and labor for such repairs.

                  6.4. SURRENDER. Upon the termination of this Lease in any
manner whatsoever, Tenant shall remove Tenant's goods and effects and those of
any other person claiming under Tenant, and quit and deliver up the Demised
Premises to Landlord peaceably and quietly in as good order and condition as at
the inception of the term of this Lease or as the same hereafter may be improved
by Landlord or Tenant, reasonable use and wear thereof, damage from fire and
other insured casualty and repairs which are Landlord's obligation excepted.
Goods and effects not removed by Tenant at the termination of this Lease,
however terminated, shall be considered abandoned and Landlord may dispose of
and/or store the same as it deems expedient, the cost thereof to be charged to
Tenant.

                  6.5. SIGNS. Tenant shall not place signs on or about any part
of the Building, or on the outside of the Demised Premises or on the exterior
doors, windows or walls of the Demised Premises, except on doors and then only
of a type and with lettering and text approved by Landlord.

                  6.6. CARE; INSURANCE. Tenant shall not overload, damage or
deface the Demised Premises or do any act which might make void or voidable any
insurance on the Demised Premises or the Building or which may render an
increased or extra premium payable for insurance (and without prejudice to any
right or remedy of Landlord regarding this subparagraph, Landlord shall have the
right to collect from Tenant, upon demand, any such increase or extra premium).

                  6.7. ALTERATIONS; ADDITIONS. Tenant shall not make any
alteration of or addition to the Demised Premises without the prior written
approval of Landlord (except for work of a decorative nature). Such approval
shall not be unreasonably withheld for nonstructural interior alteration,
provided that (i) no Building systems, structure, or areas outside of the
Demised Premises are affected by such proposed alteration, and (ii) reasonably
detailed plans and specifications for construction of the work, including but
not limited to any and all alterations having any impact on or affecting any
electrical systems, plumbing, HVAC, sprinkler system and interior walls and
partitions, are furnished to Landlord in advance of commencement of any work.
All such alterations and additions, as well as all fixtures, equipment,
improvements and appurtenances installed in and affixed to the Demised Premises
at the inception of this Lease term (but excluding Tenant's trade fixtures and
modular furniture systems) shall, upon installation, become and remain the
property of Landlord. All such alterations and additions shall be maintained by
Tenant in the same manner and order as Tenant is required to maintain the
Demised Premises generally and, upon termination of the term hereof (and as long
as Landlord has so notified Tenant at the time the approval for such alterations
is given by Landlord), shall be removed at Tenant's cost without damage to the
Demised Premises upon surrender. All alterations and additions by Tenant shall
be performed in accordance with the plans and specifications therefor submitted
to and approved by Landlord, in a good and workerlike manner and in conformity
with all Governmental Requirements. In addition, all such alterations and
additions shall be performed in strict compliance with the requirements
governing work by Tenant's contractors as set forth in Exhibit "F" hereto.

                  6.8. MECHANICS' LIENS. Tenant, within ten (10) days after
notice from Landlord,

                                     16
<PAGE>

(i) shall discharge (by bonding or otherwise) any mechanics' lien for
material or labor claimed to have been furnished to the Demised Premises on
Tenant's behalf (except for work contracted for by Landlord), (ii) shall
deliver to Landlord satisfactory evidence thereof, and (iii) shall indemnify
and hold harmless Landlord from any loss incurred in connection therewith.

                  6.9. VENDING MACHINES. Tenant shall not install or authorize
the installation of any coin-operated vending machines within the Demised
Premises, except machines for the purpose of dispensing coffee, snack foods and
similar items to the employees and business visitors of Tenant for consumption
upon the Demised Premises, the installation and continued maintenance and repair
of which shall be at the sole cost and expense of Tenant.

                  6.10. RULES AND REGULATIONS. Tenant shall observe the rules
and regulations annexed hereto as Exhibit "E", as the same may from time to time
be amended by Landlord for the general safety, comfort and convenience of
Landlord, occupants and tenants of the Building.

                  6.11. ENVIRONMENTAL COMPLIANCE. Tenant shall not transport,
use, store, maintain, generate, manufacture, handle, dispose, release or
discharge any "Waste" (as defined below) upon or about the Building, or permit
Tenant's employees, agents, contractors, and other occupants of the Demised
Premises to engage in such activities upon or about the Building or the Demised
Premises. However, the foregoing provisions shall not prohibit the
transportation to and from, and use, storage, maintenance and handling within,
the Demised Premises of substances customarily used in offices (or such other
business or activity expressly permitted to be undertaken in the Demised
Premises pursuant to the terms of this Lease), provided: (a) such substance
shall be used and maintained only in such quantities as are reasonably necessary
for such permitted use of the Demised Premises, strictly in accordance with
applicable Governmental Requirements and the manufacturers' instructions
therefor, (b) such substances shall not be disposed of, released or discharged
in the Building, and shall be transported to and from the Demised Premises in
compliance with all applicable Governmental Requirements, and as Landlord shall
reasonably require, (c) if any applicable Governmental Requirement or Landlord's
trash removal contractor requires that any such substances be disposed of
separately from ordinary trash, Tenant shall make arrangements at Tenant's
expense for such disposal directly with a qualified and licensed disposal
company at a lawful disposal site (subject to scheduling and approval by
Landlord), and shall ensure that disposal occurs frequently enough to prevent
unnecessary storage of such substances in the Demised Premises, and (d) any
remaining such substances shall be completely, properly and lawfully removed
from the Building upon expiration or earlier termination of this Lease.

                           (i)      Tenant shall  promptly  notify  Landlord of:
(a) any enforcement, cleanup or other regulatory action taken or threatened by
any governmental or regulatory authority with respect to the presence of any
Waste on the Demised Premises or the migration thereof from or to the Building,
(b) any demands or claims made or threatened by any party against Tenant or the
Demised Premises relating to any loss or injury resulting from any Waste, (c)
any release, discharge or nonroutine, improper or unlawful disposal or
transportation of any Waste on or from the Demised Premises, and (d) any matters
where Tenant is required by any Governmental Requirement to give a notice to any
governmental or regulatory authority respecting any Waste on the Demised
Premises.

                                     17
<PAGE>

Landlord shall have the right (but not the obligation) to join and
participate as a party in any legal proceedings or actions affecting the
Demised Premises initiated in connection with any environmental, health or
safety Governmental Requirement. At such times as Landlord may reasonably
request, Tenant shall provide Landlord with a written list identifying any
Waste then used, stored, or maintained upon the Demised Premises and the use
and approximate quantity of each such material. Tenant shall also furnish
Landlord with a copy of any material safety data sheet ("MSDS") issued by the
manufacturer therefor as well as any written information concerning the
removal, transportation and disposal of the same, and such other information
as Landlord may reasonably require or as may be required by Governmental
Requirement. The term "Waste" for purposes hereof shall mean any hazardous or
radioactive material, polychlorinated biphenyls, friable asbestos or other
hazardous or medical waste substances as defined by the Comprehensive
Environmental Response, Compensation and Liability Act, as amended, or by any
other federal, state or local law, statute, rule, regulation or order
(including any Governmental Requirements) concerning environmental matters,
or any matter which would trigger any employee or community "right-to-know"
requirements adopted by any such body, or for which any such body has adopted
any requirements for the preparation or distribution of a MSDS.

                           (ii) If any Waste is released, discharged or disposed
of by Tenant or any other occupant of the Demised Premises, or their employees,
agents or contractors, in or about the Building in violation of the foregoing
provisions, Tenant shall immediately, properly and in compliance with applicable
Governmental Requirements clean up and remove the Waste from the Building and
clean or replace any affected property at the Building (whether or not owned by
Landlord), at Tenant's expense. Such clean up and removal work shall be subject
to Landlord's prior written approval (except in emergencies), and shall include,
without limitation, any testing, investigation, and the preparation and
implementation of any remedial action plan required by any governmental body
having jurisdiction or reasonably required by Landlord. If Tenant shall fail to
comply with the provisions of this Paragraph within five (5) days after written
notice by Landlord, or such shorter time as may be required by any Governmental
Requirement or in order to minimize any hazard to any person or property,
Landlord may (but shall not be obligated to) arrange for such compliance
directly or as Tenant's agent through contractors or other parties selected by
Landlord, at Tenant's expense (without limiting Landlord's other remedies under
this Lease or applicable Governmental Requirement). If any Waste is released,
discharged or disposed of on or about the Building and such release, discharge,
or disposal is not caused by Tenant or other occupants of the Demised Premises,
or their employees, agents or contractors, such release, discharge or disposal
shall be deemed casualty damage under Paragraph 8 to the extent that the Demised
Premises or common areas serving the Demised Premises are affected thereby; in
such case, Landlord and Tenant shall have the obligations and rights respecting
such casualty damage provided under Paragraph 8.

         7.       SUBLETTING AND ASSIGNING.

                                     18
<PAGE>

                  7.1. GENERAL RESTRICTIONS. Tenant shall not assign this Lease
or sublet all or any portion of the Demised Premises (either a sublease or an
assignment hereinafter referred to as a "Transfer") without first obtaining
Landlord's prior written consent thereto, which shall not be unreasonably
withheld, conditioned or delayed. By way of example and without limitation, the
parties agree it shall be reasonable for Landlord to withhold consent: (1) if
the financial condition of the proposed transferee is not at least equal, in
Landlord's reasonable determination, to the financial condition (as of the date
of this Lease) of the Tenant named herein; (2) if the proposed use within the
Demised Premises conflicts with the use provision set forth herein or is
incompatible, inconsistent, or unacceptable with the character, use and image of
the Building or the tenancy at the Building in Landlord's reasonable opinion, or
conflicts with exclusive use rights granted to another tenant of the Building;
(3) if the business reputation and experience of the proposed transferee is not
sufficient, in Landlord's reasonable opinion, for it to operate a business of
the type and quality permitted under this Lease; (4) if the document creating
the Transfer is not reasonably acceptable to Landlord; (5) the nature of the
fixtures and improvements to be performed or installed are not consistent with
general office use and the terms of this Lease; (6) if the proposed transferee
is an existing tenant of Landlord (except if Landlord has no other available
space) or is currently negotiating or has negotiated within the prior twelve
(12) months with Landlord for other space in the Building; (7) if the proposed
user is a governmental or quasi-governmental agency; (8) if the proposed
transferee will be using or if Landlord has reasonable cause to believe that it
is likely to use Waste at the Demised Premises other than those types of Waste
normally used in general office operations in compliance with applicable
Governmental Requirements; (9) if Landlord has reasonable cause to believe that
the proposed transferee's assets, business or inventory would be subject to
seizure or forfeiture under any laws related to criminal or illegal activity; or
(10) if a proposed sublet involves more than twenty percent (20%) of the Demised
Premises (or, if such proposed sublet would result in more than twenty percent
(20%) of the Demised Premises, in the aggregate, being subject to one or more
subleases). If Landlord consents to a Transfer, such consent, if given, will not
release Tenant from its obligations hereunder and will not be deemed a consent
to any further Transfer. Tenant shall furnish to Landlord, in connection with
any request for such consent, reasonably detailed information as to the identity
and business history of the proposed assignee or subtenant, as well as the
proposed effective date of the Transfer and, prior to the execution thereof, a
complete set of the final documentation governing such Transfer, all of which
shall be satisfactory to Landlord in form and substance. If Landlord consents to
any such Transfer, the effectiveness thereof shall nevertheless be conditioned
on the following: (i) receipt by Landlord of a fully executed copy of the full
documentation governing the Transfer, in the form and substance approved by
Landlord, (ii) any sublessee shall acknowledge that its rights arise through and
are limited by the Lease, and shall agree to comply with the Lease (with such
exceptions as may be consented to by Landlord), and (iii) any assignee shall
assume in writing all obligations of Tenant hereunder from and after the
effective date of such Transfer. Tenant shall not advertise or otherwise
disseminate any information regarding the Building or the Demised Premises
(including, without limitation, rental rates or other terms upon which Tenant
intends to Transfer) to potential assignees and/or subtenants without in each
instance obtaining Landlord's prior written approval and consent as to the
specific form and content of any such advertisement, statement, offering or
other information (including, without limitation, approval of rental rates and
terms). Landlord's acceptance of any name for listing on the Building Directory
will not be deemed, nor will it substitute for, Landlord's consent, as required
by this Lease, to any Transfer, or other occupancy

                                     19
<PAGE>

of the Demised Premises. Tenant shall not mortgage or encumber this Lease.

                  7.2. DEFINITIONS. For purposes hereof, a Transfer shall
include any direct or indirect transfer, in any single or related series of
transactions, of (i) fifty percent (50%) or more of the voting stock of a
corporate Tenant; (ii) fifty percent (50%) or more of the interests in profits
of a partnership or limited liability company Tenant; or (iii) effective voting
or managerial control of Tenant; PROVIDED, HOWEVER, that the foregoing shall not
apply to a tenant a majority of whose ownership interests are publicly-traded on
a nationally-recognized exchange.

                  7.3. PROCEDURE FOR APPROVAL OF TRANSFER. If Tenant wishes to
request Landlord's consent to a Transfer, Tenant shall submit such request to
Landlord, in writing, together with reasonably detailed financial information
and information as to the identity and business information and business history
of the proposed transferee, as well as the proposed effective date of the
Transfer and the area or portion of the Demised Premises which Tenant wishes to
Transfer (the "Transfer Space"). If Landlord fails to respond or request
additional information from Tenant within sixty (60) days after receipt of
Tenant's proper request for approval, Tenant shall submit an additional request
to Landlord, setting forth the same information and further notifying Landlord
on such request, on a covering letter in all capital letters and bold-face type,
that Landlord's failure to respond or request additional information from Tenant
within an additional ten (10) business days shall be deemed an approval (such
notice is hereinafter referred to as an "Automatic Approval Notice"). If
Landlord fails to respond or request additional information from Tenant within
such additional ten (10) business days, such failure to so respond shall be
deemed a consent to the Transfer. If Landlord requests additional information,
Landlord shall respond within the later of (i) ten (10) business days after
receipt of all requested information, or (ii) the expiration of the sixty (60)
day period set forth above; and Landlord's failure to do so shall be deemed a
consent to the Transfer so long as such additional information shall include (on
a covering letter in all capital letters and in bold-face type) an Automatic
Approval Notice. If Landlord consents to any such Transfer, such consent shall
be given on Landlord's form of consent (which consent shall include, among other
things, an acknowledgment by the transferee that its rights arise through and
are limited by the Lease, that the transferee agrees to comply with the Lease
(with such exceptions as may be consented to by Landlord), and a written
acknowledgment by Tenant evidencing that Tenant is not released from its
obligations under this Lease), which consent document shall be executed by
Tenant and the transferee of Tenant. It shall nevertheless be a condition to the
deemed effectiveness thereof that Landlord be furnished with a fully executed
copy of the full documentation governing the Transfer, in the form and substance
approved by Landlord, and that Tenant shall pay Landlord's expenses in
connection with the proposed Transfer. It shall not be unreasonable for Landlord
to object to Transfer document provisions which, INTER ALIA, attempt to make
Landlord a party to the Transfer document or impose any obligation on Landlord
to the subtenant.

                  7.4. RECAPTURE. Upon receipt of Tenant's request for consent
to a proposed Transfer, Landlord may elect to recapture the Transfer Space.
Landlord's election to recapture must be in writing and delivered to Tenant
within thirty (30) days of Landlord's receipt of Tenant's request for permission
to Transfer all or a portion of the Demised Premises. Landlord's recapture shall
be effective (the "Effective Date") on a date selected by Landlord, which date
shall be (i) on or before

                                     20
<PAGE>

the date which is thirty (30) days after the proposed effective date of the
Transfer, as specifically set forth in Tenant's written request to Landlord
for consent to a proposed Transfer, or (ii) if Tenant's written request to
Landlord for consent to a proposed Transfer does not contain a proposed
effective date, then on or before the date which is thirty (30) days after
Landlord's election to recapture the Transfer Space; and with respect to the
Transfer Space, this Lease shall be terminated and Tenant shall be released
under this Lease, subject to any continuing liabilities or obligations of
Tenant which remain delinquent or uncured with respect to the period prior to
the Effective Date.

                  7.5. CONDITIONS. In the event Landlord consents to a Transfer
of all or any portion of the Demised Premises, Landlord may condition its
consent, INTER ALIA, on agreement by Tenant and its assignee and/or sublessee,
as the case may be, that fifty (50%) percent of any rental payable under such
Transfer arrangement which exceeds the amount of rental payable hereunder be
payable to Landlord (after deduction by Tenant for the reasonable and necessary
costs associated with such Transfer amortized over the remaining term of the
Lease) as consideration of the granting of such consent. Nothing herein shall,
however, be deemed to be a consent by Landlord of any Transfer or a waiver of
Landlord's right not to consent to any Transfer. Any purported Transfer not in
accordance with the terms hereof shall at Landlord's option, to be exercised at
any time after Landlord becomes aware of any such purported Transfer, be void,
and may at Landlord's option be treated as an event of default hereunder.

                  7.6. SPECIAL CONDITIONS FOR TRANSFERS TO AFFILIATES OF TENANT.
Notwithstanding anything to the contrary set forth above, Tenant shall be
permitted without Landlord's prior written consent, and subject to the terms of
this subparagraph 7.6, to Transfer all or a portion of the Demised Premises to
an "Affiliate" of Tenant. For purposes of this subparagraph, Affiliate shall
mean; (i) a corporation which owns fifty percent (50%) of the outstanding common
stock of Tenant, or (ii) a corporation which has fifty percent (50%) of its
common stock owned by Tenant, or (iii) a partnership which owns fifty percent
(50%) of the common stock of Tenant, or (iv) a partnership which has fifty
percent (50%) or more of its interest in partnership profits owned by Tenant, or
(v) an entity which is the surviving entity in a merger pursuant to state
corporation or partnership law with the Tenant. The effectiveness of such
Transfer to an Affiliate of Tenant shall nevertheless be conditioned on the
following: (a) Landlord receiving a fully executed copy of the full
documentation governing the Transfer, in the form and substance approved by
Landlord, and (b) such sublessee shall acknowledge that its rights arise through
and are limited by the Lease, and shall agree to comply with the Lease (with
such exceptions as may be consented to by Landlord), and (c) a written
acknowledgment by Tenant evidencing that Tenant is not released from its
obligations under this Lease.

                  7.7. NO RELEASE. Notwithstanding any assignment of this Lease
or subletting of all or part of the Demised Premises, whether or not Landlord's
consent is required and/or obtained, the tenant specifically named in the
introductory paragraph of this Lease shall remain fully liable under all of the
terms and provisions of this Lease.

         8. FIRE OR OTHER CASUALTY. In case of damage to the Demised Premises or
those portions of the Building providing access or essential services thereto,
by fire or other casualty,

                                     21
<PAGE>

Landlord shall, at its expense, cause the damage to be repaired to a
condition as nearly as practicable to that existing prior to the damage, with
reasonable speed and diligence, subject to delays which may arise by reason
of adjustment of loss under insurance policies, Governmental Regulations, and
for delays beyond the control of Landlord, including a "force majeure" (as
defined below). Landlord shall not, however, be obligated to repair, restore,
or rebuild any of Tenant's property or any alterations or additions made by
Tenant. Landlord shall not be liable for any inconvenience or annoyance to
Tenant, or Tenant's visitors, or injury to Tenant's business resulting in any
way from such damage or the repair thereof except, to the extent and for the
time that the Demised Premises are thereby rendered untenantable, the rent
shall proportionately abate. In the event the damage shall involve the
Building generally and shall be so extensive that Landlord shall decide, at
its sole discretion, not to repair or rebuild the Building, or if the
casualty shall not be of a type insured against under standard fire policies
with extended type coverage, or if the holder of any mortgage, deed of trust
or similar security interest covering the Building shall not permit the
application of adequate insurance proceeds for repair or restoration, this
Lease shall, at the sole option of Landlord, exercisable by written notice to
Tenant given within sixty (60) days after Landlord is notified of the
casualty and to the extent thereof, be terminated as of a date specified in
such notice (which shall not be more than ninety [90] days thereafter), and
the rent (taking into account any abatement as aforesaid) shall be adjusted
to the termination date and Tenant shall thereupon promptly vacate the
Demised Premises.

         9.       REGARDING INSURANCE AND LIABILITY.

                  9.1. DAMAGE IN GENERAL. Tenant agrees that Landlord and its
Building manager and their respective partners, officers, employees and agents
shall not be liable to Tenant, and Tenant hereby releases such parties, for any
personal injury or damage to or loss of personal property in the Demised
Premises from any cause whatsoever unless such damage, loss or injury is the
result of the gross negligence or willful misconduct of Landlord, its Building
manager, or their partners, officers, employees or agents, and Landlord and its
Building manager and their partners, officers or employees shall not be liable
to Tenant for any such damage or loss whether or not the result of their gross
negligence or willful misconduct to the extent Tenant is compensated therefor by
Tenant's insurance or would have been compensated therefor under commonly
available commercial policies, and Landlord shall in no event be liable to
Tenant for any consequential damages.

                  9.2.     INDEMNITY.

                  (a) Tenant shall defend, indemnify and save harmless Landlord
and its agents and employees against and from all liabilities, obligations,
damages, penalties, claims, costs, charges and expenses, including reasonable
attorneys' fees, which may be imposed upon or incurred by or asserted against
Landlord and/or its agents or employees by reason of any of the following which
shall occur during the term of this Lease, or during any period of time prior to
the Commencement Date hereof or after the expiration date hereof when Tenant may
have been given access to or possession of all or any part of the Demised
Premises:

                           (i)      any work or act done in, on or about the
Demised Premises or any part thereof at the direction of Tenant, its agents,
contractors, subcontractors, servants, employees,

                                     22
<PAGE>

licensees or invitees, except if such work or act is done or performed by
Landlord or its agents or employees;

                           (ii)     any  negligence  or other  wrongful  act or
omission on the part of Tenant or any of its agents, contractors,
subcontractors, servants, employees, subtenants, licensees or invitees;

                           (iii) any accident, injury or damage to any person or
property occurring in, on or about the Demised Premises or any part thereof,
unless caused by the gross negligence or willful misconduct of Landlord, its
employees or agents; and

                           (iv) any failure on the part of Tenant to perform or
comply with any of the covenants, agreements, terms, provisions, conditions or
limitations contained in this Lease on its part to be performed or complied
with.

                  (b) Landlord shall defend, indemnify and save harmless Tenant
and its agents and employees against and from all liabilities, obligations,
damages, penalties, claims, costs, charges and expenses, including reasonable
attorneys' fees, which may be imposed upon or incurred by or asserted against
Tenant and/or its agents or employees by reason of any of the following which
shall occur during the term of this Lease:

                           (i)      any negligence or other intentional wrongful
act on the part of Landlord or any of its agents, contractors, subcontractors,
servants, employees, subtenants, licensees or invitees; and

                           (ii) any accident, injury or damage to any person or
property occurring in an area in the Building under the exclusive custody and
control of Landlord, unless caused by the gross negligence or willful misconduct
of Tenant, its employees or agents;

provided, however, that Landlord shall not be liable for and shall not indemnify
and protect Tenant with respect to any losses associated with Tenant's lost
business opportunities, lost profits, business losses or any consequential
damages. The foregoing indemnity by Landlord shall only apply to liabilities,
obligations, damages, penalties, claims, costs, charges and expenses, including
reasonable attorneys' fees, to the extent the same are not covered by the
insurance Tenant is required to carry hereunder (and, if Tenant fails in any
respect to secure and maintain the insurance required hereunder, only to the
extent the same would not have been covered if Tenant had secured and maintained
the insurance required hereunder).

                  9.3. TENANT'S INSURANCE. At all times during the term hereof,
Tenant shall maintain in full force and effect with respect to the Demised
Premises and Tenant's use thereof, comprehensive public liability insurance,
naming Landlord and Landlord's agent (and such other parties as Landlord may
request) as additional insureds, covering injury to persons in amounts at least
equal to $2,000,000.00 per occurrence and $2,000,000.00 general aggregate. Each
such policy shall provide that it shall not be cancelable without at least
thirty (30) days prior written notice to Landlord and to any mortgagee named in
an endorsement thereto and shall be issued by an insurer and in a form

                                     23
<PAGE>

satisfactory to Landlord. Tenant shall lodge with Landlord duplicate
originals or certificates of such insurance, in a form acceptable to
Landlord, at or prior to the commencement date of the term hereof, together
with evidence of paid-up premiums, and shall lodge with Landlord renewals
thereof at least fifteen (15) days prior to expiration. In addition to the
foregoing, Tenant shall also be responsible, at Tenant's own cost, to keep
and maintain (i) insurance in respect of and covering Tenant's own furniture,
furnishings, equipment and other personal property, all insured for the
replacement cost thereof, against all risks and hazards, including but not
limited to sprinkler and leakage damage, and theft, and (ii) workers'
compensation insurance with respect to and covering all employees of Tenant.
Tenant shall also carry, at Tenant's own cost and expense, such other
insurance, in amounts and for coverages and on such other terms as Landlord
may from time to time deem commercially reasonable and appropriate. Tenant
assumes all risk of loss of any or all of its personal property.

                  9.4. WAIVER OF SUBROGATION. Each party hereto hereby waives
any and every claim which arises or which may arise in its favor and against the
other party hereto during the term of this Lease or any extension or renewal
thereof for any and all loss of, or damage to, any of its property located
within or upon or constituting a part of the Building, to the extent that such
loss or damage is recovered under an insurance policy or policies and to the
extent such policy or policies contain provisions permitting such waiver of
claims. Each party shall cause its insurers to issue policies containing such
provisions.

                  9.5. LIMITATION ON PERSONAL LIABILITY. Anything in this Lease,
either expressed or implied, to the contrary notwithstanding, Tenant
acknowledges and agrees that each of the covenants, undertakings and agreements
herein made on the part of Landlord, while in form purporting to be covenants,
undertakings and agreements of Landlord, are, nevertheless, made and intended
not as personal covenants, undertakings and agreements of Landlord, or for the
purpose of binding Landlord personally or the assets of Landlord, except
Landlord's interest in the Building; and that no personal liability or personal
responsibility is assumed by, nor shall at any time be asserted or enforceable
against Landlord, any partner of Landlord, any parent or subsidiary of Landlord
or any parent, subsidiary or partner of any partner of Landlord, or any of their
respective heirs, personal representatives, successors and assigns, or officers
or employees on account of this Lease or on account of any covenant, undertaking
or agreement of Landlord in this Lease contained, all such personal liability
and personal responsibility, if any, being expressly waived and released by
Tenant.

                  9.6. SUCCESSORS IN INTEREST TO LANDLORD, MORTGAGEES. The term
"Landlord" as used in this Lease means the fee owner of the Building, or, if
different, the party holding and exercising the right, as against all others
(except space tenants of the Building) to possession of the entire Building.
Landlord as above-named represents that it is the holder of such rights as of
the date hereof. In the event of the voluntary or involuntary transfer of such
ownership or right to a successor-in-interest of Landlord, Landlord shall be
freed and relieved of all liability and obligation hereunder which shall
thereafter accrue and Tenant shall look solely to such successor-in-interest for
the performance of the covenants and obligations of the Landlord hereunder which
shall thereafter accrue. The liability of any such successor in interest to
Landlord under or with respect to this Lease shall be strictly limited to and
enforceable only out of its or their interest in the Building and Land, and
shall not be enforceable out of any other assets. No mortgagee or ground lessor
which shall

                                     24<PAGE>

DEPARTMENT OF HEALTH & HUMAN SERVICES                Public Health Service

                                                     Food and Drug
                                                     Administration
                                                     9200 Corporate Boulevard
                                                     Rockville MD 20850

JAN 27 2000

Mr. Al Memmolo.
Director, Quality Assurance and
 Regulatory Affairs
AccuLase, Inc.
2431 Impala Drive
Carlsbad, California 92008

Re:                 K992914
                    Trade Name: Excimer Laser Phototherapy System, AL7000
                    Regulatory Class: II
                    Product Code: GEX
                    Dated: November 24,1999
                    Received: November 29, 1999

Dear Mr. Memmolo:

We have reviewed your Section 510(k) notification of intent to market the device
referenced above and we have determined the device is substantially equivalent
(for the indications for use stated in the enclosure.) to devices marketed in
interstate commerce prior to May 28, 1976, the enactment date of the Medical
Device Amendments, or to devices that have been reclassified in accordance with
the provisions of the Federal Food, Drug, and Cosmetic Act (Act). You may,
therefore, market the device, subject to the general controls provisions of the
Act. The general controls provisions of the Act include requirements for annual
registration, listing of devices, good manufacturing practice, labeling, and
prohibitions against misbranding and adulteration.

If your device is classified (see above) into either class II (Special Controls)
or class III (Premarket Approval), it may be subject to such additional
controls. Existing major regulations affecting your device can be found in the
CODE OF FEDERAL REGULATIONS, Title 21, Parts 800 to 895. A substantially
equivalent determination assumes compliance with the current Good Manufacturing
Practice requirement, as set forth in the Quality System Regulation (QS) for
Medical Devices: General regulation (21 CFR Pan 820) and that, through periodic
(QS) inspections, the Food and Drug Administration (FDA) will verify such
assumptions. Failure to comply with the GMP regulation may result in regulatory
action. In addition, FDA may publish further announcements concerning your
device in the FEDERAL REGISTER. Please note: this response to your premarket
notification submission does not affect any obligation you might have under
sections 531 through 542 of the Act for devices under the Electronic Product
Radiation Control provisions, or other Federal laws or regulations.

This letter will allow you to begin marketing your device as described in your
510(k) premarket notification. The FDA finding of substantial equivalence of
your device to a legally marketedpredicate device results in a classification
for your device and thus, permits your device, to proceed to the market.

<PAGE>

If you desire specific advice for your device on our labeling regulation (21 CFR
Part 801 and additionally 809.10 for IN VITRO diagnostic devices), please
contact the Office of Compliance at (301) 594-4595. Additionally, for questions
on the promotion and advertising of your device, please contact the Office of
Compliance at (301) 594-4639. Also, please note the regulation entitled,
"Misbranding by reference to premarket notification" (21 CFR 807.97). Other
general information on your responsibilities under the Act may be obtained from
the Division of Small Manufacturers Assistance at its toll-free number (800)
638-2041 or (301) 443-6597 or at its internet address
"http://www.fda.gov/cdrh/dsmamain.htad".

                                            Sincerely yours,

                                            James E. Dillard III
                                            Acting Director
                                            Division of General and
                                             Restorative Devices
                                            Office of Device Evaluation
                                             Center for Devices and
                                             Radiological Health
Enclosure

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