Light Emitting Diode (LED) Lamps represent new technology with expanding applications, particularly in color and specialty applications. If you still think LEDs are only for little red indicator lights on electronic gizmos, check out LEDs. LED replacements for incandescent bulbs are available for numerous applications in many sizes, shapes, colors and packages.
Efficiency:
The lighting efficiency of LED lamps typically varies with the color produced. As this is a developing technology, manufacturers are constantly researching for improved efficiencies. These are some typical values as of February 2004.
Red LEDs - 22-42 lumens/watt
Orange LEDs - 18-22 lumens/watt
Yellow and "amber" LEDs - 14-35 lumens/watt
Green LEDs - 20-32+ lumens/watt
Blue-Green LEDs - 25-28 lumens/watt
Blue LEDs - 8 to10 lumens/watt
White LEDs -The better usual modern white LEDs (as of January 2004) produce about 17-25 lumens of light per watt of electricity delivered to the LEDs. Compare to 14-17.5 lumens per watt for standard 120 volt 60 to 100 watt incandescent lamps, and typically 16 to 21 for most halogen lamps rated to last 2,000 hours or more.
