4.1.3 Efficiency
LED
light bulbs use only 2-17 Watts of electricity. LED bulbs used in fixtures
inside the home save electricity, remain cool and save money on replacement
costs since LED bulbs last so long. Small LED flashlight bulbs will extend
battery life 10 to 15 times longer than with incandescent bulbs.
LEDs
do not provide ultraviolet radiation and infrared radiation. The only loss for
LED is the heat loss. Industry experts expect continued improvement in light
output and cost effectiveness of LED lighting. LED manufacturers expect that
LED efficacy will ultimately be achieving a goal of 150 to 200 lumens per watt
in the future.
LEDs
also have favorable operating characteristics where the light do not require
any strike time which means it is instantly come on and off without effect of
lifetimes.
|
Light Source
|
Loss in
Radiation (%)
|
Heat Loss (%)
|
|
Incandescent Lamp
|
81-86
|
5-6
|
|
Fluorescent Lamp
|
30-32
|
44
|
|
HID (mercury)
|
62-65
|
16-22
|
|
LED
|
0-0.2
|
80-88
|
Table
4.1: Losses for different lighting devices
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