SUPPLEMENT DATED MAY 30, 1996 TO
                      THE PROSPECTUS DATED MAY 1, 1996 FOR
                       FIRSTLINE VARIABLE UNIVERSAL LIFE
               A FLEXIBLE PREMIUM VARIABLE LIFE INSURANCE POLICY
                                   issued by
                   SECURITY LIFE OF DENVER INSURANCE COMPANY
                                    and its
                       SECURITY LIFE SEPARATE ACCOUNT L1


This Supplement updates certain information contained in your Prospectus.
Please read it carefully and keep it with your Prospectus for future reference.

The investment objective of the INVESCO VIF Industrial Income Portfolio on page
19 of the Prospectus is hereby deleted and amended to read as follows:

  INVESCO VIF Industrial Income Portfolio -- seeks the best possible current
    income, while following sound investment practices. Capital growth potential
    is an additional consideration in the selection of portfolio securities. The
    Portfolio normally invests at least 65% of its total assets in dividend-
    paying common stocks. Up to 10% of the Portfolio's total assets may be
    invested in equity securities that do not pay regular dividends. The
    remaining assets are invested in other income-producing securities, such as
    corporate bonds. The Portfolio also has the flexibility to invest in other
    types of securities.

The first paragraphs in the sections entitled "Lapse" on pages 14 and 33 of the
Prospectus are hereby deleted and amended to read as follows:

  Insurance coverage will continue as long as the Net Cash Surrender Value of
  the Policy is sufficient to pay all the deductions that are taken out of the
  Account Value each month. In addition, during the first three Policy years
  (the special continuation period), if on each Monthly Processing Date the sum
  of the premiums paid, less the sum of Partial Withdrawals, any outstanding
  Policy Loan and accrued loan interest is greater than or equal to one twelfth
  of the Minimum Annual Premium times the number of completed Policy months,
  then the Policy and all attached Riders are guaranteed not to lapse,
  regardless of the Net Cash Surrender Value.

 
May 30, 1996



VIA EDGAR
- ---------



Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C.  20549

     Re:  Security Life Separate Account L1 (the "Registrant") of
          Security Life of Denver Insurance Company

          File No.:  33-74190

Commissioners:

Enclosed for filing pursuant to the requirement of Rule 497(d) under the
Securities Act of 1933, as amended (the "1933 Act") is a copy of a prospectus
supplement dated May 30, 1996 to the prospectus dated May 1, 1996 of the above
referenced Registrant.  The supplement describes a change in the investment
objective of the INVESCO VIF Industrial Income Portfolio, one of the underlying
funding options available through the variable life insurance policies issued
through the Registrant.  The supplement also makes a minor correction to the
"Lapse" sections of the prospectus.

Please call the undersigned at (303) 894-4923 with any questions.

Very truly yours,

/s/:  KURT W. BERNLOHR

Kurt W. Bernlohr
Assistant General Counsel