Commercial LEDs

Lumens/watt
SiC
Blue
<0.1
GaAsxP1-x
Red to yellow
0.15-1
GaP
Green
1-2.5
AlxGa1-xAs
Red to infrared
4-10
InxGa1-xN
Blue to green
6-8
AlxGa.5-x In.5P
Yellow to red
30-40
Hewlett Packard Application Brief I-009 (6/98)