DS46 Datasheet, PDF (14/15 Pages) Lumileds Lighting Company – power light source LUXEON® III Star

Typical Side Emitting Representative Spatial Radiation Pattern
Side Emitting Radiation Pattern
100
90
80
70
60
50
40
30
20
10
0
-120 -100 -80 -60 -40 -20 0 20 40 60 80 100 120
Angular Displacement (Degrees)
Figure 12. Typical Representative Spatial Radiation Pattern
for LUXEON Emitter White, Green and Blue..
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
-120 -100
-80 -60 -40 -20 0 20 40 60 80
Angular Displacement (Degrees)
100 120
Figure 13. Typical Representative Spatial Radiation Pattern
for LUXEON Side Emitting Emitter Red, Red Orange and Amber.
Average Lumen Maintenance Characteristics
Lifetime for solid state lighting devices (LEDs) is typically defined in terms of lumen maintenance the percentage of
initial light output remaining after a specified period of time. Lumileds projects that white, green, cyan, blue, and royal blue
LUXEON III products will deliver, on average, 70% lumen maintenance at 50,000 hours of operation at a 700 mA forward current
or 50% lumen maintenance at 20,000 hours of operation at a 1000 mA forward current. Lumileds projects that red, red orange,
and amber LUXEON III products will deliver, on average 50% lumen maintenance at 20,000 hours of operation at a 1400 mA
forward current. This performance is based on independent test data, Lumileds historical data from tests run on similar material
systems, and internal LUXEON reliability testing. This projection is based on constant current operation with junction temperature
maintained at or below 90°C. Observation of design limits included in this data sheet is required in order to achieve this
projected lumen maintenance.
LUXEON III Star DS46 (3/06)
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