Lighting efficiency

Lighting efficiency is a measure of how much visible light is given off from a light source per unit of energy. It is measured in lumens per watt (lumens/watt). Energy not converted into visible light is radiated as heat, or at the ends of the visible spectrum as ultraviolet or infrared.

Related Topics:
Visible light - Light - Energy - Lumen - Watt - Heat - Spectrum - Ultraviolet - Infrared

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• 005 lumens/watt Incandescent tungsten filament at 7 watts (night light)
• 010 lumens/watt Incandescent tungsten filament at 100 watts (room light)
• 020 lumens/watt Incandescent halogen at 100 watts (T3)
• 020 lumens/watt Light emitting diode at 3 watts (white)
• 050 lumens/watt Fluorescent compact at 12 watts
• 060 lumens/watt Fluorescent at 32 watts (F40T12} cool white
• 070 lumens/watt Fluorescent at 32 watts (T8)
• 150 lumens/watt Sodium vapor lamp low pressure
 
Lighting efficiency: See also ►