SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 10-Q


[X]  QUARTERLY  REPORT  PURSUANT  TO  SECTION  13  OR  15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934

For the quarterly period ended                 March 31, 2000
                               -------------------------------------------------


                         Commission File Number 1-5426.



                               THOMAS INDUSTRIES INC.
--------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)


         Delaware                                     61-0505332
--------------------------------------------------------------------------------
 (State or other jurisdiction of                   (I.R.S. Employer
 incorporation or organization)                    Identification No.)


4360 Brownsboro Road, Louisville, Kentucky                     40207
--------------------------------------------------------------------------------
(Address of principal executive offices)                     (Zip Code)

Registrant's telephone number, including area code         502/893-4600
                                                  ------------------------------


                                  Not Applicable
--------------------------------------------------------------------------------
(Former  name,  former  address,  and former  fiscal year, if changed since last
report.)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding  twelve months (or for such shorter period that the registrant was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days.       Yes [X]       No

The number of shares  outstanding of issuer's  Common Stock, $1 par value, as of
April 29, 2000, was 15,504,612 shares.









                                  Page 1 of 10




PART I.  FINANCIAL INFORMATION
------   ---------------------

Item 1.  Financial Statements (Unaudited)


                     THOMAS INDUSTRIES INC. AND SUBSIDIARIES
             CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED)
                 (Dollars in Thousands Except Amounts Per Share)


                                                         Three Months Ended
                                                             March 31
                                                           2000       1999
                                                           ----       ----

Net sales                                                $50,386         $46,301
Cost of products sold                                     32,587          29,493
                                                          ------          ------
Gross profit                                              17,799          16,808
Selling, general, and
  administrative expenses                                 11,159          11,252
Equity income from Lighting                                5,411           4,985
                                                          ------          ------
Operating income                                          12,051          10,541
Interest expense                                             987           1,185
Interest income and other                                    575             501
                                                          ------          ------
Income before income taxes                                11,639           9,857
Income taxes                                               4,481           3,983
                                                          ------          ------
Net income                                               $ 7,158         $ 5,874
                                                          ======          ======
Net income per share
    Basic                                                   $.46            $.37
    Diluted                                                 $.45            $.36

Dividends declared per share                              $0.075          $0.075

Weighted average number of shares outstanding
  Basic                                                   15,582          15,758
  Diluted                                                 15,950          16,141


See notes to condensed consolidated financial statements.













                                       2



<PAGE>

                     THOMAS INDUSTRIES INC. AND SUBSIDIARIES
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                             (Dollars in Thousands)

                                                       (Unaudited)
                                                         March 31    December 31
ASSETS                                                     2000         1999*
                                                           ----         ----
Current assets
  Cash and cash equivalents                             $  4,871       $ 16,487
  Accounts receivable, less allowance
    (2000--$770; 1999--$698)                              25,105         20,869
  Inventories:
    Finished products                                      4,682          4,965

    Raw materials                                         10,313         10,209

    Work in process                                        4,721          4,577
                                                         -------        -------
                                                          19,716         19,751

  Deferred income taxes                                    2,865          2,634

  Other current assets                                     3,020          3,370
                                                         -------        -------
                            Total current assets          55,577         63,111
Investment in GTG                                        164,231        158,865
Property, plant and equipment                             80,054         78,903

  Less accumulated depreciation and amortization          44,238         42,751
                                                         -------        -------

                                                          35,816         36,152
Note receivable from GTG                                  22,287         22,287

Intangible assets--less accumulated amortization          10,253         10,677

Other assets                                               2,984          2,884
                                                         -------        -------

                                    Total assets        $291,148       $293,976
                                                         =======        =======

LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities
  Notes payable                                         $    600       $     --

  Accounts payable                                         8,790          7,794

  Other current liabilities                               19,112         15,289

  Current portion of long-term debt                        7,784          7,784
                                                         -------        -------
                       Total current liabilities          36,286         30,867

Deferred income taxes                                      5,953          6,027

Long-term debt (less current portion)                     32,770         40,513
Other long-term liabilities                                6,945          7,087
                                                         -------        -------
                             Total liabilities            81,954         84,494
Shareholders' equity
  Preferred Stock, $1 par value
    3,000,000 shares authorized--none issued                  --             --
  Common Stock, $1 par value, shares authorized:
    60,000,000; shares issued: 2000 -- 17,588,055;
                               1999 -- 17,567,104         17,588         17,567
  Capital surplus                                        111,238        110,988
  Retained earnings                                      115,679        109,689

  Accumulated other comprehensive income                 (7,600)        (6,385)
  Less cost of treasury shares:
    (2000--2,088,550; 1999--1,807,650)                  (27,711)       (22,377)
                                                         -------        -------
                      Total shareholders' equity         209,194        209,482
                                                         -------        -------



      Total liabilities and shareholders' equity        $291,148       $293,976
                                                         =======        =======


*Derived from the audited  December 31, 1999,  consolidated  balance sheet.  See
 notes to condensed consolidated financial statements.


                                       3
<PAGE>


                     THOMAS INDUSTRIES INC. AND SUBSIDIARIES
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                                   (UNAUDITED)
                             (Dollars in Thousands)

                                                         Three Months Ended
                                                               March 31
                                                               --------
                                                           2000          1999
                                                           ----          ----

Operating activities:
Net income                                                $ 7,158       $ 5,874
Adjustments to reconcile net income to net
  cash provided by operating activities:
        Depreciation and amortization                       2,189         2,101
        Deferred income taxes                                (280)           53
        Equity income from Lighting                        (5,411)       (4,985)
        Distributions from Lighting                           --            711
        Other items                                           133            28
        Changes in operating assets and liabilities:
               Accounts receivable                         (4,640)       (4,228)
               Inventories                                   (380)         (120)
               Accounts payable                             1,083         1,444
               Accrued expenses and other liabilities       3,864         3,082
               Other                                          322          (680)
                                                           ------         ------
Net cash provided by operating activities                   4,038         3,280
                                                           ------        ------

Investing activities:
   Purchases of property, plant, and equipment             (2,002)       (2,140)
   Sale of property, plant, and equipment                       2            --
                                                           ------         ------
Net cash used in investing activities                     ( 2,000)       (2,140)
                                                          -------         ------

Financing activities:
   Proceeds from notes payable to banks, net                  600           281
   Payments on long-term debt, net                         (7,743)       (7,743)
   Treasury stock purchased                                (5,334)           --
   Dividends paid                                          (1,187)       (1,195)
   Other                                                      316            226
                                                           ------         ------
Net cash used in financing activities                     (13,348)       (8,431)
Effect of exchange rate change                               (306)         (256)
                                                          -------         ------

Net decrease in cash and cash equivalents                 (11,616)       (7,547)

Cash and cash equivalents at beginning of period           16,487        18,205
                                                           ------        ------

Cash and cash equivalents at end of period                $ 4,871       $10,658
                                                           ======        ======



See notes to condensed consolidated financial statements.


                                       4

<PAGE>



                     THOMAS INDUSTRIES INC. AND SUBSIDIARIES


NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)


Note A - Basis of Presentation
------------------------------

The accompanying unaudited condensed consolidated financial statements have been
prepared in accordance with generally accepted accounting principles for interim
financial  reporting and with the instructions to Form 10-Q and Article 10-01 of
Regulation  S-X.  Accordingly,  they  do not  include  all the  information  and
footnotes  required by generally  accepted  accounting  principles  for complete
financial statements.

The results of operations for the  three-month  period ended March 31, 2000, are
not  necessarily  indicative  of the results  that may be expected  for the year
ending  December  31,  2000.  In the  opinion  of  management,  all  adjustments
considered  necessary for a fair  presentation  have been included.  For further
information,  refer  to the  consolidated  financial  statements  and  footnotes
included in the Company's Annual Report on Form 10-K for the year ended December
31, 1999.


Note B - Contingencies
----------------------

In the normal  course of business,  the Company is a party to legal  proceedings
and claims. When costs can be reasonably estimated,  appropriate liabilities for
such matters are recorded.  While  management  currently  believes the amount of
ultimate  liability,  if any, with respect to these actions will not  materially
affect the  financial  position,  results of  operations,  or  liquidity  of the
Company,  the  ultimate  outcome  of  any  litigation  is  uncertain.   Were  an
unfavorable outcome to occur, the impact could be material to the Company.

Note C - Comprehensive Income
-----------------------------

For the three months ended March 31, comprehensive income was:

                                             2000            1999
                                             ----            ----

        Net income                         $7,158           $5,874
        Foreign currency translation       (1,215)          (1,722)
                                            -----            -----
        Comprehensive income               $5,943           $4,152
                                            =====            =====









                                       5


<PAGE>

Note D - Net Income Per Share
-----------------------------

The  computation of the numerator and denominator in computing basic and diluted
net income per share follows:

    (In Thousands)                                          2000          1999
                                                            ----          ----

    Numerator:
        Net income                                          $ 7,158     $ 5,874
                                                             ======      ======

    Denominator:
        Weighted average shares outstanding                  15,582      15,758

    Effect of dilutive securities:
        Director and employee stock options                     334         335
        Employee performance shares                              34          48
                                                             ------      ------
        Dilutive potential common shares                        368         383
                                                             ------      ------
        Denominator for diluted earnings per share
             adjusted weighted average shares and
             assumed conversions                             15,950      16,141
                                                             ======      ======


Note E - Genlyte Thomas Group LLC
---------------------------------

The following table contains  certain  unaudited  financial  information for the
Joint Venture.

                            Genlyte Thomas Group LLC
                         Condensed Financial Information
                             (Dollars in Thousands)

                                              (Unaudited)
                                                March 31         December 31
                                                  2000               1999
                                                  ----               ----
         Balance sheet:
              Current assets                      $328,569            $321,788
              Long-term assets                     229,564             231,643
              Current liabilities                  155,640             170,478
              Long-term liabilities                 74,901              73,785

                                                    Three Months Ended
                                                        March 31
                                                  -----------------------------
                                                  2000               1999
                                                  ----               ----
         Income statement:
              Net sales                           $244,655            $237,476
              Gross profit                          81,346              77,378
              Earnings before interest and taxes    20,196              19,153
              Net income*                           18,563              17,231

     *Amounts recorded by Thomas Industries Inc.:

              Equity income from GTG              $  5,940            $  5,514
              Amortization of excess investment       (529)               (529)
                                                   -------             -------
              Equity income reported by Thomas    $  5,411            $  4,985
                                                   =======             =======



                                      6



<PAGE>


Note F - Receivables from Affiliate
-----------------------------------

Included in Other Long-Term  Assets at March 31, 2000, and December 31, 1999, is
$22,287,000  which represents a debt  equalization note payable to Thomas by GTG
related to the formation of the Joint Venture.  Interest on the principal amount
outstanding  under the note  accrues at a variable  rate based on LIBOR plus the
Offshore Rate Margin and is payable on a quarterly  basis.  The principal amount
of the note is due on August 29, 2003, and may be prepaid in whole or in part at
any time without premium or penalty.


Note G - Segment Disclosures
----------------------------

                                                        Three Months Ended
                                                             March 31
                                                        ------------------

                                                         2000        1999
                                                         ----        ----
Revenues

Total net sales including intercompany sales
  Compressors & Vacuum Pumps                           $55,148          $50,294

Intercompany sales
  Compressors & Vacuum Pumps                            (4,762)          (3,993)
                                                         -----            -----

Net sales to unaffiliated customers
  Compressors & Vacuum Pumps                           $50,386          $46,301
                                                        ======           ======

Operating Income
  Compressors & Vacuum Pumps                           $ 8,474          $ 7,765
  Lighting*                                              5,411            4,985
  Corporate                                             (1,834)          (2,209)
                                                        ------            -----
                                                       $12,051          $10,541
                                                        ======           ======

*Represents 32% of GTG net income less amortization of excess investment.


Item 2.  Management's  Discussion  and  Analysis  of  Financial Condition and
         Results of Operations.

Results of Operations
---------------------

Net sales  during the first  quarter  ended March 31, 2000,  were $50.4  million
compared  to $46.3  million  for the first  quarter of 1999.  The 8.8% net sales
increase was generated by very strong results achieved in our North American and
Asia Pacific  operations.  The medical market was the largest contributor to the
sales increase.  In U.S. dollars, our European operations posted a 1.9% decrease
in net sales,  but this was primarily due to an unfavorable  Euro exchange rate.
When measured at a constant  exchange  rate, our European  operations  posted an
8.3% increase in net sales.


                                       7


<PAGE>

Item 2.  Management's  Discussion  and  Analysis - Continued

Operating  income for the first quarter ended March 31, 2000, was $12.1 million,
or 14.3% higher than the prior-year  amount of $10.5 million.  Our Compressors &
Vacuum Pumps Segment  posted a 9.1%  increase in operating  income over the 1999
first quarter.  This was principally due to increased sales volume. Our Lighting
Segment results increased to $5.4 million in the first quarter of 2000, compared
to $5.0 million in the same period last year. We had lower corporate expenses in
the first  quarter  of 2000  compared  to 1999,  which also  contributed  to the
improvement in operating income.

Net income for the 2000 first  quarter of $7.2 million was 21.9% higher than the
$5.9  million  for the  comparable  1999  period.  It was a record for any first
quarter in the  Company's  history.  The increase over 1999 was due primarily to
increased  sales  volume,  the  increase  in  GTG's  earnings,  lower  corporate
expenses, and lower interest expense as noted below.

Interest  expense for the 2000 first  quarter was $1.0  million,  or 16.7% lower
than the prior-year amount of $1.2 million. Long-term debt of $7.7 was paid down
on January 31, 2000, which reduced interest expense over the prior-year amount.

Included in Other Long-Term  Assets at March 31, 2000, and December 31, 1999, is
$22,287,000 which represents the debt equalization note payable to Thomas by GTG
related to the formation of the Joint Venture.  Interest on the principal amount
outstanding  under the note  accrues  at a  variable  rate and is  payable  on a
quarterly basis. The principal amount of the note is due on August 29, 2003, and
may be prepaid in whole or in part at any time without premium or penalty.

Working  capital of $19.3 million at March 31, 2000, is $13.0 million lower than
the amount at December  31,  1999,  primarily  resulting  from the $7.7  million
long-term  debt payment on January 31, 2000,  and from the $5.3 million spent in
the first quarter of 2000 on the stock  repurchase  program.  Since December 31,
1999, we have purchased an additional  280,900  shares for the stock  repurchase
program that was announced in December  1999. To date, we have  purchased,  on a
cumulative basis, 345,400 shares at a cost of $6,667,447. Accounts receivable at
March 31, 2000,  have  increased by 20.3% since December 31, 1999, due to higher
sales  volume.  The  number of days  sales in  receivables  at March  31,  2000,
compared to December 31, 1999, has decreased to 43.9 days from 48.0.  Annualized
inventory  turnover at March 31, 2000,  of 5.5 improved  significantly  from the
December 31, 1999, level of 5.0.

Certain loan agreements of the Company include  restrictions on working capital,
operating  leases,  tangible net worth,  and the payment of cash  dividends  and
stock distributions. Under the most restrictive of these arrangements,  retained
earnings of $65.1 million are not restricted at March 31, 2000.



                                       8

<PAGE>

Item 2.  Management's  Discussion  and  Analysis - Continued

As of March 31,  2000,  the Company had  available  credit of $5.7  million with
banks under short-term  borrowing  arrangements,  which was unused.  Anticipated
funds from operations,  along with available  short-term credit, are expected to
be sufficient  to meet cash  requirements  in the year ahead.  Cash in excess of
operating  requirements  will  continue  to be  invested  in  investment  grade,
short-term securities.

Year 2000 Issue
---------------

During 1999,  the Company  completed  the process of preparing for the Year 2000
date change. To date, the Company has had no material Year 2000 issues.

Although  considered  unlikely,  unanticipated  problems could still occur.  The
Company  will  continue  to monitor  all  business  processes,  including  third
parties,  throughout 2000 to address any issues and to ensure that all processes
continue to function properly.

The cost for the Year 2000 project was  approximately  $2.4  million,  which was
incurred over the 1996-1999  time frame.  We anticipate no material  costs to be
incurred in 2000 and beyond that are related to the Year 2000 project.

The Company has a minority  interest in GTG,  which has advised the Company that
it had no material Year 2000 issues.  Although we believe it is unlikely, if GTG
has future problems related to the Year 2000 project,  this could have an impact
on the Company's financial results and condition.

New European Currency
---------------------

Eleven  European  countries  (The European  Monetary  Union) have  implemented a
single  currency  zone as of January  1,  1999.  The new  currency  (Euro)  will
eventually replace the existing currencies of the participating countries. It is
expected that this transition from the various currencies to the Euro will occur
over a two-year  period.  The software used by our European  operations has been
modified to accommodate the dual currencies during the transition period. A team
is in place to monitor any changing EMU  requirements and to establish the final
conversion timetable for the single EMU currency.

While  management  currently  believes the Company has accommodated any required
changes  in its  operations,  there  can be no  assurance  that  its  customers,
suppliers,  service  providers,  or  government  agencies will all meet the Euro
currency requirements in a timely manner. Such failure to complete the necessary
work on a timely basis could result in material financial risk.

Item 3.  Quantitative and Qualitative Disclosures about Market Risk

The  Company's  long-term  debt bears  interest at fixed rates;  therefore,  the
Company's  results of  operations  and cash  flows  would  only be  affected  by
interest rate changes to the extent that variable rate, short-term notes payable
are  outstanding.  At March 31, 2000,  there was $.6 million in short-term notes
payable outstanding.


                                       9


<PAGE>

Item 2.  Management's  Discussion  and  Analysis - Continued

The fair value of the  Company's  long-term  debt is estimated  based on current
interest  rates  offered to the  Company for  similar  instruments.  The Company
believes that the effect,  if any, of reasonably  possible  near-term changes in
interest  rates on the Company's  consolidated  financial  position would not be
significant.

The Company has  significant  operations  consisting of sales and  manufacturing
activities in foreign countries.  As a result,  the Company's  financial results
could be  significantly  affected by factors such as changes in foreign currency
exchange rates or weak economic  conditions in the foreign  markets in which the
Company  manufactures  or  distributes  its  products.  Currency  exposures  are
concentrated  in Germany  but exist to a lesser  extent in other parts of Europe
and Asia.



PART II. OTHER INFORMATION
-------  -----------------

Item 6.  Exhibits and Reports on Form 8-K

            (a)  Exhibits

                           27          Financial Data Schedule.

(b)      No reports on Form 8-K were filed during the quarter.





                                   SIGNATURE

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned thereunto duly authorized.

                                                   THOMAS INDUSTRIES INC.
                                                   ----------------------
                                                        Registrant

                                        /s/ Phillip J. Stuecker
                                       ---------------------------------------
                                       Phillip J. Stuecker, Vice President and
                                         Chief Financial Officer

Date      May 12, 2000
    ------------------------