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.

• 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)
• 045 lumens/watt Light-emitting diode at 1 watt (white)
• 022 lumens/watt Light-emitting diode at 3 & 5 watts (white)
• 065 lumens/watt Light-emitting diode at 3 watts (red-orange)
• 050 lumens/watt [[Compact fluorescent lamp|Fluorescent

• 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

See also

• Light pollution

External links

• Energy Efficient Light Bulbs
• Energy Efficient Lighting Resources
• Other Power
• CIPCO Energy Library

Lighting | Energy_economics

Efficacité lumineuse