DS45 LUMILEDS [Lumileds Lighting Company], DS45 Datasheet - Page 15

• Manufacturer Part Number: DS45
• Manufacturer: LUMILEDS [Lumileds Lighting Company]

Typical Side Emitting Representative Spatial Radiation Pattern
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 Emitter DS45 (3/06)
100%
90%
80%
70%
60%
50%
40%
30%
20%
10%
0%
100
-120 -100 -80
90
80
70
60
50
40
30
20
10
0
Figure 12. Typical Representative Spatial Radiation Pattern
Figure 13. Typical Representative Spatial Radiation Pattern
-120 -100 -80
Side Emitting Radiation Pattern
for LUXEON Emitter Red, Red Orange and Amber.
for LUXEON Emitter White, Green and Blue.
Angular Displacement (Degrees)
Angular Displacement (Degrees)
-60
-60
-40
-40
-20
-20
15
0
0
20
20
40
40
60
60
80
100 120
80
100
120