EXH10-12

THIS  INSTRUMENT AND THE SHARES OF STOCK INTO WHICH IT IS  EXERCISABLE  HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED,  OR THE SECURITIES
LAWS OF ANY STATE AND MAY NOT BE OFFERED,  SOLD OR OTHERWISE TRANSFERRED WITHOUT
AN  EFFECTIVE  REGISTRATION  UNDER  SUCH ACT  UNLESS IN AN  OPINION  OF  COUNSEL
SATISFACTORY TO THE ISSUER AN EXEMPTION FROM REGISTRATION IS THEN AVAILABLE.

                            STOCK WARRANT CERTIFICATE


December 5, 1990                                  Warrant to Purchase
                                                  100,000 Shares of Common Stock

                        Warrant to Purchase Common Stock
                      of AUTOMATED LIGHT TECHNOLOGIES, INC.

This is to certify that, FOR VALUE RECEIVED,  CONNECTICUT DEVELOPMENT AUTHORITY,
a body politic and corporate  constituting public  instrumentality and political
subdivision of the State of Connecticut,  its successors and assigns ("Holder"),
is  entitled  to  purchase,  subject to the  provisions  of this  Warrant,  from
AUTOMATED LIGHT TECHNOLOGIES,  INC., a Delaware corporation (the "Company"), One
Hundred  Thousand  (100,000)  shares of common  stock,  $.01 par  value,  of the
Company  ("Common  Stock")  at a price of ONE  HUNDRED  FIFTY  THOUSAND  DOLLARS
($150,000.00)  (the  "Exercise  Price")  and in  consideration  of a loan in the
amount of THREE HUNDRED THOUSAND DOLLARS ($300,000.00) made by the Holder to the
Company of even date herewith (the "Loan").

         Section I. EXERCISE OF WARRANT.  Subject to and in accordance  with the
provisions  of Section V hereof,  this  Warrant may be  exercised in whole or in
part at any time,  or from time to time,  on or after  December  5, 1990 but not
later than 3:30 p.m.  Eastern Standard Time on January l, 1998, or if January l,
1998 is a day on which banking institutions are authorized by law to close, then
on the next  succeeding day which shall not be such a day, by  presentation  and
surrender to the Company of this Warrant together with the Purchase Form annexed
hereto duly executed and  accompanied  by payment of the Exercise Price with all
federal and state taxes, if any, applicable upon such exercise.  If this Warrant
should be  exercised in part only,  the Company  shall,  upon  surrender of this
Warrant and at its  expense,  execute and deliver a new Warrant  evidencing  the
right of the Holder to purchase the balance of the shares purchasable hereunder.
Upon  receipt  by the  Company of this  Warrant at the office of the  Company in
proper  form for  exercise,  accompanied  by payment of the  Exercise  Price and
requisite taxes, if any, the Company shall forthwith issue and deliver, or cause
to be issued and  delivered,  to the Holder as soon as  practicable,  but in any
event within thirty (30) days, a certificate or  certificates  for the shares of
Common Stock issuable upon such exercise.  The exercise of this Warrant shall be
deemed to have been effected immediately prior to the close of


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business  on the  business  day on which  this  Warrant  is  surrendered  to the
Company, and at such time the person in whose name the certificate for shares of
Common Stock shall be issuable upon such exercise shall be deemed to have become
the holder of record of such Common Stock.

         Section II.       ADJUSTMENTS.

         (a) Adjustment for Stock Splits and Combinations.  If the Company shall
at any time, or from time to time,  after the date hereof,  effect a subdivision
of its  outstanding  capital stock  ("Common  Stock") then, at the option of the
Holder,   (I)  the  Exercise  Price  then  in  effect  immediately  before  that
subdivision shall be proportionately  decreased and (ii) the number of shares of
Common Stock issuable upon the exercise of this Warrant (the "Number of Issuable
Shares") shall be  proportionately  increased,  and  conversely,  if the Company
shall at any time,  or from time to time,  after the date  hereof,  combine  its
outstanding  shares of Common Stock,  then, at the option of the Holder, (I) the
Exercise  Price  then in effect  immediately  before  the  combination  shall be
proportionately  increased  and (ii) the  Number  of  Issuable  Shares  shall be
proportionately decreased. Any adjustment under this Subsection (a) shall become
effective  at the  close  of  business  on  the  day  any  such  subdivision  or
combination  becomes effective.  In the event that the Holder fails to make such
election on or before the effective  date of such  subdivision  or  combination,
then Holder shall be deemed to have selected option (I).

         (b) Adjustment for Certain Dividends and Distributions.  If the Company
at any time, or from time to time,  after the date hereof,  shall make or issue,
or fix a record date for the  determination  of holders of Common Stock entitled
to receive,  a dividend or other distribution  payable,  in additional shares of
Common Stock, then, and in each such event, at the option of the Holder:

(i) the Exercise  Price then in effect shall be decreased as of the date of such
issuance  or, at the time or upon the event  such a record  date shall have been
fixed,  as of the close of business on such record date (the  "Record  Date") by
multiplying  the  Exercise  Price then in effect by a  fraction,  determined  as
follows:

         (x) the  numerator  of which  shall be the  total  number  of shares of
Common Stock issued and  outstanding  immediately  prior to the Record Date plus
the number of shares  that  Holder is  entitled  to upon full  exercise  of this
Warrant: and

         (y) the  denominator  of which  shall be the total  number of shares of
Common Stock issued and  outstanding  immediately  prior to the Record Date plus
the number of shares  that  Holder is  entitled  to upon full  exercise  of this
Warrant Rules the number


<PAGE>



of shares of Common Stock issuable in payment of such dividend or  distribution,
and

(ii) the  Number of  Issuable  Shares  shall be  increased  to equal the  number
derived by dividing the  Exercise  Price by the  adjusted  Exercise  Price which
would result after application of subsection (i) above.

For purposes of this  Subsection  (b), If such Record Date shall have been fixed
and such dividend is not fully paid or if such distribution is not fully made on
the date fixed therefor,  the Exercise Price or--the Number of Issuable  Shares,
as the case may be, shall be recomputed  accordingly as of the close of business
on such Record Date, and thereafter the Exercise Price or the Number of Issuable
Shares, as the case may be, shall be adjusted pursuant to this Subsection (b) as
of the day and time that each actual payment of such dividends or  distributions
is made.

         (c) Adjustment for Reclassification,  Exchange and Substitution. If the
Common Stock issuable upon the exercise hereof shall be changed into the same or
a  different  number  of shares of any class or  classes  of stock,  whether  by
reclassification,  exchange,  substitution or other  transaction  having similar
effect  (other than a subdivision  or  combination  of shares or stock  dividend
provided  for above,  or a  reorganization,  merger,  consolidation,  or sale of
assets  provided for elsewhere in this Section II) then, and in each such event,
the Holder shall have the right  thereafter to receive upon the exercise of this
Warrant the kind and amount of shares of stock and other securities and property
receivable  upon  such   reclassification,   exchange,   substitution  or  other
transaction  having  similar effect as did or shall the holders of shares of the
Common   Stock  as  of  the  day   immediately   prior  to  the  day  that  such
reclassification,  exchange or substitution is or becomes effective, all subject
to further  adjustment  as provided in  subparagraphs  a, b, d and e herein,  if
applicable.

         (d)  Reorganization,  Mergers,  Consolidations or Sale of Assets. If at
any  time,  or from time to time,  there  shall be  (other  than a  subdivision,
combination,  reclassification,  exchange,  substitution  of shares provided for
elsewhere  {n this  Section II) a capital  reorganization  involving a merger or
consolidation  of the Company with or into another  corporation,  or the sale or
transfer (a "Sale") of all or substantially all of the Company's  properties and
assets to any other  person;  then,  as a part of such  reorganization,  merger,
consolidation or Sale, adequate provision shall be made so that the Holder shall
thereafter be entitled to receive, upon exercise hereof, the number of shares of
stock or other  securities  or  property  of the  Company,  or of the  successor
corporation, resulting from such reorganization,  merger, consolidation or Sale,
as to which a holder of Common  Stock  deliverable  upon the  ultimate  exercise
hereof  would  have  been  entitled  to  receive  as a  result  of such  capital
reorganization, merger, consolidation or Sale. In the


<PAGE>



case of a Sale in which the Company  receives a cash payment equal to that which
a holder of Common Stock  deliverable  upon the ultimate  exercise  hereof would
have been entitled to receive as a result of such Sale less the Exercise  Price.
In any such case, appropriate adjustment shall be made in the application of the
provisions of this Section II with respect to the rights of the Holder after the
reorganization,  merger, consolidation or Sale to the end that the provisions of
this Section II (including  adjustment of the Exercise  Price then in effect and
the number of shares  issuable upon exercise  hereof) shall be applicable  after
any such event as nearly equivalent as may be practicable.

         (e) Adjustment for Issuance of New Shares.  If the Company at any time,
or from time to time, after the date hereof,  shall issue  additional  shares of
Common Stock (other than a subdivision, combination, reclassification, exchange,
substitution of shares,  reorganization,  merger, consolidation or Sale provided
for elsewhere in this Section II) at a less than the Exercise Price then, and in
each such event:

(i) the Exercise  Price then in effect shall be decreased as of the date of such
issuance (the "issuance  Date") by multiplying the Exercise Price then in effect
by a fraction, determined as follows:

         (x) the  numerator  of which  shall be the  total  number  of shares of
Common Stock issued  immediately  prior to the Issuance  Date plus the number of
shares that Holder is entitled to upon full exercise of this Warrant: and

         (y) the  denominator  of which  shall be the total  number of shares of
Common Stock issued  immediately  prior to the Issuance  Date plus the number of
shares that Holder is entitled to upon full  exercise of this  Warrant  plus the
number of new shares issued as of the Issuance Date and

(ii) the  Number of  Issuable  Shares  shall be  increased  to equal the  number
derived by dividing the  Exercise  Price by the  adjusted  Exercise  Price which
would result after application of subsection (i) above.

If the Company shall at any time,  or from time to time,  after the date hereof,
issue  additional  shares of Common Stock not otherwise  described  elsewhere in
this  Section at a price  equal to or greater  than the  Exercise  Price then in
effect , then,  and in each such event,  the Number of Issuable  Shares shall be
increased to equal the number derived by multiplying  the number of shares which
Holder is  entitled  to purchase  pursuant  to this  Warrant by a fraction,  the
numerator  of which shall be the total  number of shares of Common  Stock issued
immediately  prior to the Issuance  Date plus the number of new shares issued as
of the Issuance Date and the  denominator  of which shall be the total number of
shares of Common Stock issued  immediately  prior to the Issuance  Date. If such
shares are issued at a price greater than three Dollars


<PAGE>



($3.00) per share,  then the  Exercise  Price for such  additional  shares which
Holder is entitled to purchase as a result of the  adjustment  set forth  herein
shall equal the issuance  price of such  shares.  If such shares are issued at a
price equal to or less than Three Dollars  ($3.00) per share,  then the exercise
Price for the additional shares which Holder is entitled to purchase as a result
of the adjustment set forth herein shall equal the then existing Exercise Price.
If, at the time a public  offering is made of the Common  Stock of the  Company,
the Company  demonstrates to Holder that the provisions of this subsection would
have a material,  adverse  impact on the  Company's  ability to make such public
offering,  then  Holder  agrees that it shall  negotiate  in good faith with the
Company to amend this  subsection to provide  Holder with a similar  position to
that provided by this subsection while ameliorating the impediment to the public
offering.

         Section III.  RESERVATION OF SHARES;  REGISTRATION  RIGHTS. The Company
hereby  agrees that at all times during the terms of this Warrant there shall be
reserved  for  issuance  such  number of shares of its Common  Stock as shall be
required to be issued upon  exercise of this  Warrant.  The Company  also agrees
that, in the event it registers any of its shares of stock,  whatever type, with
the  Securities  and  Exchange  Commission,  it  shall  include  as part of such
registration, and at no cost to the Holder, any shares of Common Stock which may
be reserved by the Company as required by this  Warrant and any shares of Common
Stock  which may have been  issued to the Holder  pursuant  to the terms of this
Warrant. If the managing underwriter determines that marketing factors require a
limitation on the number of shares to be underwritten,  the managing underwriter
may limit the number of shares of Common  Stock to be issued to or issued to the
Holder  pursuant to this  Warrant to be included in the  registration  of Common
Stock. The Common Stock held by officers, directors and employees of the Company
shall be excluded from registration  before limiting the number of shares of the
Holder to be included  therein.  If after  excluding the shares of the officers,
directors and employees of the Company a limitation is still required, then such
limitation shall be allocated  proportionally  among all shareholders wishing to
sell their  shares of Common  Stock  pursuant to  contractual  rights to include
their shares in a Company registration.

         Section IV. FRACTIONAL SHARES. This Warrant may be exercised only for a
whole  number  of  shares of Common  Stock,  and no  fractional  shares or scrip
certificate  representing  fractional shares shall be issuable upon the exercise
of this Warrant.

         Section  V.  STOCKHOLDERS'  RIGHTS.  Until the valid  exercise  of this
Warrant and as provided  herein,  in whole or in part,  the Holder  shall not be
entitled to any rights of a stockholder.


<PAGE>




         Section VI.      COMPLIANCE WITH SECURITIES ACT; DISPOSITION OF WARRANT
OR SHARES OF COMMON STOCK; RIGHT OF REDEMPTION.

         (a) Compliance with Securities Act. The Holder,  by acceptance  hereof,
agrees  that this  Warrant  and the  shares of  Common  Stock to be issued  upon
exercise  hereof are being  acquired for investment and that the Holder will not
offer,  sell or otherwise  dispose of this Warrant or any shares of Common Stock
to be issued upon  exercise  hereof  except under  circumstances  which will not
result in a violation of the  Securities  Act of 1933, as amended (the "Act") or
the securities  laws of any state.  This Warrant (to the extent  applicable) and
all shares of Common Stock issued upon exercise of this Warrant  (unless  either
is  registered  under the Act) shall be stamped or  imprinted  with  restrictive
legend as appears hereon.

         (b) Disposition of Warrant and Shares. With respect to any offer, sale,
transfer,  assignment  or other  disposition  of this  Warrant  or any shares of
Common  Stock  acquired  pursuant  to the  exorcise  of this  Warrant  prior  to
registration  of such  shares,  the  Holder  and each  subsequent  holder of the
warrant agrees to give written  notice to the Company prior thereto,  describing
briefly  the  manner  thereof,  together  with the  written  opinion  of counsel
satisfactory  to the  Company,  to the effect that such offer,  sale , transfer,
assignment  or  other  disposition  may  be  effected  without  registration  or
qualification  (under the Act as then in effect or any federal or state law then
in  effect) of this  Warrant  or such  shares of Common  Stock,  and  indicating
whether or not under the Act  certificates  for this  Warrant or such  shares of
Common Stock to be sold or otherwise  disposed of require any restrictive legend
as to applicable  restrictions on  transferability in order to ensure compliance
with the Act. Each certificate representing this Warrant or the shares of Common
Stock thus  transferred  (except a transfer  pursuant  to Rule 144) shall bear a
legend as to the applicable  restriction on  transferability  in order to ensure
compliance with the Act, unless in the aforesaid opinion of counsel satisfactory
to the Company,  such legend is not required in order to ensure  compliance with
the Act. The Company may issue stop transfer  instructions to its transfer agent
in connection with the foregoing restrictions.

         (c)  Right of  Redemption.  At any time  between  January  1,  1996 and
January 1, 1998 (or if January  1, 1998 is a day on which  banking  institutions
are authorized by law to close,  then on the next succeeding day which shall not
be such a day),  the Holder  shall have the right to elect,  at its  option,  to
require  the Company to redeem this  Warrant  or, if  applicable,  any shares of
Common  Stock  acquired  pursuant  to the  exercise of this  Warrant;  provided,
however,  that in the event  registration  of such  shares  shall occur prior to
January  1, 1996 the  Holder  may  immediately  elect to  exercise  its right of
redemption  hereunder.  The redemption price (the  "Redemption  Price") for this
Warrant shall


<PAGE>



be One Hundred Fifty  Thousand and No/100 Dollars  ($150,000.00)  and for all of
the shares shall be Three Hundred Thousand and No/100 Dollars ($300,000.00).  An
election by the Holder under this  subsection  (c) may be made at any time after
January 1, 1996 or sooner as  provided  for herein  and,  if made,  shall be set
forth in a written  redemption  notice delivered to the Company (the "Redemption
Notice").  The Redemption Notice shall specify a date on which the redemption is
to occur (the "Redemption  Date"),  which date shall be no less than thirty (30)
days from the date of the delivery of the redemption Notice.

         If, for any reason,  including but not limited to the unavailability of
funds  legally  required  to do so, the  Company  is legally  unable to effect a
redemption on Redemption Date, such Redemption Date shall be extended until such
time as the Company shall have made the  redemption  in full,  the Company being
obligated  to make  redemption(s)  in whole or in part not earlier than ten (10)
days nor later than twenty (20) days from each date on which it becomes  legally
able to do so;  provided,  however,  that if the  Company  is unable to effect a
redemption  within ninety (90) days of the  Redemption  Date the Holder,  at its
option,  and without  relieving the Company of its  redemption  obligation,  may
exercise any right which it may have to offer,  sell or otherwise dispose of all
or part of the Warrant or the shares of Common Stock held by it.

         Section  VII.  REPLACEMENT  OF  WARRANTS.   Upon  receipt  of  evidence
reasonably  satisfactory  to the  Company  of the loss,  theft,  destruction  or
mutilation of this Warrant or any subsequent Warrant and receipt of an indemnity
agreement  reasonably  satisfactory to the Company,  the Company at its expense,
will execute and deliver a new Warrant of like tenor.

         Section VIII.     APPLICABLE LAW. This Warrant shall be governed by and
construed in accordance with the laws of the State of Connecticut.

         Section IX.  DEFAULT IN LOAN  AGREEMENT.  In the event that the Company
fails to comply with the  provisions  of  Paragraph  3(j) of the Loan  Agreement
between  the  Company and Holder  executed  as of even date  herewith,  then the
number of shares that Holder is entitled to purchase hereunder shall increase to
200,000  and  the  redemption  price  shall  increase  to  $300,000.00  for  the
redemption of the Warrant and $600,000.00 for the redemption of the Common Stock
issued pursuant to this Warrant.

                                    COMPANY:

                                    AUTOMATED LIGHT TECHNOLOGIES, INC.


                                    By:                         
                                        ------------------------------
                                             MOHD A. ASLAMI
                                             Its President,
                                             Duly Authorized


Dated as of December 5, 1990


<PAGE>



                                  PURCHASE FORM

                                 100,000 Shares

                       AUTOMATED LIGHT TECHNOLOGIES, INC.

                             a Delaware corporation


The undersigned, being the Holder of a Stock Warrant Certificate (the "Warant"),
dated December ___, 1990, entitling the Holder to purchase, on or before January
1, 1998, at 3:30 p.m., One Hundred  Thousand  (100,000)  shares of Common Stock,
$.01  par  value  of the  above  corporation  at a price  of  $150,000.00,  upon
presentation of this purchase form and payment of the applicable  purchase price
at the office of the Company  subject to the  provisions  of the  Warrant,  this
purchase ______ shares of such Common Stock by presentation of the Warrant, this
purchase  form and  $_________in  full  payment of the  purchase  price for such
shares of Common Stock.


         Dated_____________________, 199___.


                                            CONNECTICUT DEVELOPMENT AUTHORITY


                                            By:______________________________