5.6 : Lighting




5.6.9 Typical Efficacies and Lifetimes of Lamps (1)
Efficacy Typical Rated
Current Technology (lumens/Watt) Lifetime (hours) CRI (2)
Incandescent 10 - 19 750 - 2,500 97
Halogen 14 - 20 2,000 - 3,500 99
Fluorescent - T5 25 - 55 6,000 - 7,500 52 - 75
Fluorescent - T8 35 - 87 7,500 - 20,000 52 - 90
Fluorescent - T12 35 - 92 7,500 - 20,000 50 - 92
Compact Fluorescent 40 - 70 10,000 82
Mercury Vapor 25 - 50 29,000 15 - 50
Metal Halide 50 - 115 3,000 - 20,000 65 - 70
High-Pressure Sodium 50 - 124 29,000 22
Low-Pressure Sodium 18 - 180 18,000 0
Solid State Lighting 20 - 100 15,000 - 50,000 33-97
Note(s): 1) Theoretical maximum luminous efficacy of white light is 220 lumens/Watt. 2) CRI = Color Rendering Index, which indicates a lamp's ability to show natural colors. 3) The DOE Solid State Lighting program has set an efficacy goal twice that of fluorescent lights (160 lumen per Watt).









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