4. LED Basic Components
LED chips are made of silicone
(like computer chips) then
mounted in a “package” that has
some electrical leads and
sometimes a heat sink
5. Currently Most LED’s Are Directional
But not so good for applications better
suited to omni directional lamps
6. LED Light Distribution
Some LEDs have
diffusion lenses to
spread out the
light, or don't have
the reflective cap.
7. Color Rendering...
Color Rendering Index ( CRI )
How Natural And Normal
Do People And
Things Appear Under
Artificial Light?
CRI Scale goes from: 0 - 100,
with 100 being the best CRI
9. Efficiency: Lumens, Watts, & Efficacy
Lumens: total “light”
Watts: total power
Efficacy: how much light for the power
(lumens per watt, LPW)
(similar to miles per gallon)
_______
Watts
10. Common Colour Temperatures
Approx Temp.
8500K
6500K
6000K
4500K
4000K
3000K
2500K
2000K
Light Source
Blue Sky
Daylight Fluorescent Lamp
Clear Mercury Lamp
Clear Metal Halide Lamp
Cool White Fluorescent Lamp
Halogen Lamp, WW Fluorescent
40 Watt Incandescent Lamp
Candle, HP Sodium Lamp
