HALIS JEFFREY S
SC 13D/A, 2000-01-05
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D. C. 20549
                                  SCHEDULE l3D
                                (Amendment No. 5)
                    Under the Securities Exchange Act of 1934


                        ECHELON INTERNATIONAL CORPORATION
- --------------------------------------------------------------------------------
                                (Name of Issuer)

                     Common Stock, par value $0.01 per share
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    278747100
- --------------------------------------------------------------------------------
                                 (CUSIP Number)
                                                      with a copy to:
Jeffrey S. Halis                                      Peter S. Friedman, Esq.
10 East 50th Street                                   Lowenstein Sandler P.C.
New York, New York  10022                             65 Livingston Avenue
(212) 588-9697                                        Roseland, New Jersey 07068
                                                      (973) 597-2570
- --------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                December 21, 1999
- --------------------------------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)

If the filing person has previously  filed a statement on Schedule l3G to report
the  acquisition  which is the subject of this  Schedule 13D, and is filing this
schedule  because  of Section 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g),  check
the following box. [ ]

Note:  Schedules  filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule l3d-7 for other parties
to whom copies are to be sent.

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).


<PAGE>


________________________________________________________________________________
1)   Names of Reporting  Persons  (S.S. or I.R.S.  Identification  Nos. of Above
     Persons):

                                Jeffrey S. Halis
________________________________________________________________________________
2)   Check the Appropriate Box if a Member of a Group (See Instructions):

         (a)                                         Not
         (b)                                        Applicable
________________________________________________________________________________
3)   SEC Use Only
________________________________________________________________________________
4)   Source of Funds (See Instructions): WC, PF
________________________________________________________________________________
5)   Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d)
     or 2(e): Not Applicable
________________________________________________________________________________
6)   Citizenship or Place of Organization:

                             United States
________________________________________________________________________________
     Number of                          7) Sole Voting Power:          573,532*
     Shares Beneficially                ----------------------------------------
     Owned by                           8) Shared Voting Power:              0
     Each Reporting                     ----------------------------------------
     Person With:                       9) Sole Dispositive Power:     573,532*
                                        ----------------------------------------
                                       10) Shared Dispositive Power:         0
                                       -----------------------------------------

________________________________________________________________________________
11)  Aggregate Amount Beneficially Owned by Each Reporting Person:

                  573,532*
________________________________________________________________________________
12)  Check if the  Aggregate  Amount in Row (11)  Excludes  Certain  Shares (See
     Instructions):

                                 Not Applicable
________________________________________________________________________________
13)  Percent of Class Represented by Amount in Row (11): 8.6%*
________________________________________________________________________________

14)  Type of Reporting Person (See Instructions): IA, IN
________________________________________________________________________________
*    392,949 shares (5.8%) of Echelon  International  Corporation  common stock,
     par  value  $0.01 per  share  (the  "Common  Stock")  are owned by  Tyndall
     Partners, L.P., a Delaware limited partnership ("Tyndall").  133,003 shares
     (2.0%) of the  Common  Stock are owned by Tyndall  Institutional  Partners,
     L.P., a Delaware  limited  partnership  ("Tyndall  Institutional").  42,580
     shares  (0.6%) of the Common  Stock are owned by Madison  Avenue  Partners,
     L.P.,  a Delaware  limited  partnership  ("Madison").  0 shares (0%) of the
     Common Stock are owned by Halo  International,  Ltd.,  a company  organized
     under the laws of the Cayman Islands ("Halo"). Pursuant to the Agreement of
     Limited Partnership of each of Tyndall, Tyndall Institutional,  and Madison
     and the Investment Management Agreement of Halo, Jeffrey S. Halis possesses
     sole voting and  investment  control over all  securities  owned by each of
     Tyndall, Tyndall Institutional, Madison and Halo. In addition, 5,000 shares
     (0.1%) of the Common  Stock are owned  individually  by  Jeffrey S.  Halis.
     Jeffrey S. Halis  possesses  sole voting and  investment  control  over the
     shares of Common  Stock owned  individually  by him. See Item 5 for further
     information on the computation of percentages set forth herein.

<PAGE>

Item 1.   Security and Issuer

          This statement  relates to the common stock, par value $0.01 per share
(the  "Common  Stock") of Echelon  International  Corporation,  whose  principal
executive  offices  are  located  at  450  Carillon  Parkway,   Suite  200,  St.
Petersburg, Florida 33716.

Item 5.   Interest in Securities of the Issuer.

          Based   upon   information   set   forth  in   Echelon   International
Corporation's  quarterly report on Form 10-Q for the quarter ended September 30,
1999,  as of  November  10,  1999 there were  6,719,723  shares of Common  Stock
outstanding.  As of December 21, 1999, Tyndall Partners,  L.P. ("Tyndall") owned
392,949 (5.8%) of such shares,  Tyndall Institutional  Partners,  L.P. ("Tyndall
Institutional")  owned 133,003 (2.0%) of such shares, Halo  International,  Ltd.
("Halo")  owned  0  (0.0%)  of  such  shares,  Madison  Avenue  Partners,   L.P.
("Madison")  owned  42,580  (0.6%)  of  such  shares,   and  Jeffrey  S.  Halis,
individually,  owned 5,000 (0.1%) of such shares.  Jeffrey Halis  possesses sole
power to vote and direct the  disposition of all shares of Common Stock owned by
each of  Tyndall,  Tyndall  Institutional,  Madison,  Halo and  individually  by
Jeffrey S.  Halis.  The  following  table  details the  transactions  by each of
Tyndall, Tyndall Institutional and Halo International,  Ltd. in shares of common
stock of Echelon International Corp. during the sixty days preceding the date of
event which requires  filing of this  statement  (each of which were effected in
ordinary brokers transactions):

                            A. Tyndall Partners, L.P.

         Date                        Quantity                          Price

                                   (Purchases)

                                      NONE

                                     (Sales)

December 21, 1999                     7,100                            $25.34


<PAGE>

                           B. Halo International, Ltd.

         Date                        Quantity                          Price

                                   (Purchases)

                                      NONE

                                     (Sales)

November 15, 1999                     1,000                            $21.95
November 23, 1999                     8,600                            $23.07
November 24, 1999                     1,500                            $22.82
November 26, 1999                     5,500                            $23.05
November 29, 1999                     3,500                            $22.88
December 1, 1999                        700                            $22.89
December 2, 1999                      1,000                            $22.89
December 3, 1999                     20,000                            $22.88
December 6, 1999                        600                            $22.83
December 7, 1999                      4,800                            $22.89
December 8, 1999                     20,000                            $23.11
December 9, 1999                      5,000                            $24.47
December 13, 1999                     6,700                            $23.71
December 16, 1999                     2,000                            $23.57
December 17, 1999                     6,000                            $24.32
December 20, 1999                     7,900                            $24.52
December 21, 1999                     7,900                            $25.34



                     C. Tyndall Institutional Partners, L.P.

         Date                        Quantity                         Price

                                    (Purchases)

October 21, 1999                      3,200                            $23.94
October 22, 1999                      7,300                            $23.93
October 25, 1999                      2,000                            $23.81

                                     (Sales)

                                      NONE


<PAGE>



                                    Signature

          After  reasonable  inquiry  and  to  the  best  of  the  undersigned's
knowledge and belief,  the undersigned hereby certifies that the information set
forth in this statement is true, complete and correct.

                                       January 5, 2000


                                      /s/   Jeffrey   S. Halis
                                      Jeffrey  S. Halis, individually and as the
                                      managing  member of   Jeffrey  Management,
                                      L.L.C.,  the   general   partner  of  Halo
                                      Capital Partners,  L.P., the general part-
                                      ner of  each of  Tyndall  Partners,  L.P.,
                                      Tyndall Institutional  Partners, L.P., and
                                      Madison Avenue Partners,   L.P., and  as a
                                      member of  Jemi  Management, L.L.C.,   the
                                      Investment Manager for Halo International,
                                      Ltd.


      ATTENTION: INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE
                FEDERAL CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001).




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