Consent of Independent Auditors
We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 33-73133) pertaining to the Lithonia Lighting 401(k) Plan for Hourly Employees of National Service Industries, Inc. of our report dated June 25, 2001, with respect to the financial statements of the Lithonia Lighting 401(k) Plan for Hourly Employees included in this Annual Report (Form 11-K) for the year ended December 31, 2000.

/s/ Ernst & Young LLP
Atlanta, Georgia
June 25, 2001