LEI Companies, Inc. Electricians LEI Companies, Inc. Visit Website 14828 W. 6th Ave. Unit 12-B Golden, CO 80401 (303) 934-5631 About Map About LEI Companies is a Denver based commercial electrical contractor and energy solution provider specializing in in renovations, new construction and special systems including fire alarm and building automation. What's Nearby? Distance: 5 10 15 20 25 50 mi.