For instance to get the same light output of 500 lumens, you can either use a 40W incandescent bulb, a 9W CFL bulb or a 6W LED bulb.
LED Area Light, Adjustable Watt and Color, 160-320W, 150Lm/W, 5000K, Ac277-480V, High Volt Options include Adjustable Slip Fitter item # LOC-ADJUSTABLESLIPFITTER, Adjustable Arm item # LOC-ADJUSTABLEARM, Trunnion item # LOC-TRUNNION, and U-Bracket item # LOC-UBRACKET. MOUNT NOT INCLUDED. Lumens per watt can vary based on a manufacturers product design, LED chip technology and other factors.