EXHIBIT 6.A
[letterhead of Security Life here]


April 27, 2000

Security Life of Denver Insurance Company
1290 Broadway
Denver, CO  80203-5699

Re:     Security Life Separate Account L1
        Pre-Effective Amendment No. 1; SEC File No. 333-34404

Gentlemen:

In my capacity as Executive Vice President, CFO and Chief Actuary of Security
Life of Denver Insurance Company ("Security Life"), I have provided actuarial
advice concerning:

The preparation of Pre-Effective Amendment No. 1 to the Registration Statement
on Form S-6 (File No. 333-34404) to be filed by Security Life and its Security
Life Separate Account L1 (the "Separate Account") with the Securities and
Exchange Commission ("SEC") under the Securities Act of 1933 with respect to the
Estate Designer variable universal life insurance policies; and

The preparation of the policy forms for the Estate Designer variable universal
life insurance policies described in Pre-Effective Amendment No. 1 (the
"Policies").

It is my professional opinion that

1.      The aggregate fees and charges under the Policies are reasonable in
        relation to the services rendered the expenses expected to be incurred
        and the risks assumed by Security Life.

2.      The illustrations of death benefits, account value, cash surrender
        value, and total premiums paid plus interest at 5 percent shown in the
        Prospectus, based on the assumptions stated in the illustration are
        consistent with the provisions of the Policies. The rate structures of
        the Policies have not been designed so as to make the relationship
        between premiums and benefits, as shown in the illustrations included,
        appear to be correspondingly more favorable to prospective buyers than
        other illustrations which could have been provided at other combinations
        of ages, sex of the insured, death benefit option and amount, definition
        of life insurance test, premium class, and premium amounts. Insureds of
        other premium classes may have higher costs of insurance charges.

3.      All other numerical examples shown in the Prospectus are consistent with
        the Policies and our other practices, and have not been designed to
        appear more favorable to prospective buyers than other examples which
        could have been provided.

I hereby consent to the filing of this opinion as an Exhibit to Pre-Effective
Amendment No. 1 to the Registration Statement and the use of my name under the
heading "Experts" in the Prospectus.

Sincerely,

/s/ James L. Livingston, Jr.

James L. Livingston, Jr., F.S.A., M.A.A.A.
JLL:tls