DS22 LUMILEDS [Lumileds Lighting Company], DS22 Datasheet - Page 7

• Manufacturer Part Number: DS22
• Description: power light source Luxeon Ring
• Manufacturer: LUMILEDS [Lumileds Lighting Company]

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 Luxeon products will deliver on
average 70% lumen maintenance at 50,000 hours of operation. 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 350 mA operation per LED (700 mA for
Ring) 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 Ring
100
80
60
40
20
0
-40
Angular Displacement - Degrees
-30 -20 -10
0
7
10 20
30
Document #: DS22 (10/05)
40
Figure 7.
Representative Spatial Radiation Pattern
for one Luxeon LED with optics, all
colors.
Note:
For more detailed technical information
regarding Luxeon radiation patterns,
please consult your Lumileds Authorized
Distributor or Lumileds sales representative.