DS24 LUMILEDS [Lumileds Lighting Company], DS24 Datasheet - Page 7

• Manufacturer Part Number: DS24
• Description: power light source Luxeon Flood
• 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 12
Up Flood, 1050 mA for 18 Up Flood) 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 Flood
Batwing Radiation Pattern (without optics)
Lambertian Radiation Pattern
Figure 8. Representative Spatial Radiation Pattern
per Luxeon emitter for Red and Amber.
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Figure 7a. Representative Spatial
Radiation Pattern per Luxeon
emitter White.
Angular Displacement (Degrees)
Angular Displacement (Degrees)
0
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80 100
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Figure 7b. Representative Spatial Radiation
Pattern per Luxeon emitter for Red, Amber,
Green, Cyan and Blue.
0
-100 -80 -60 -40 -20
Angular Displacement (Degrees)
Document #: DS24 (10/05)
Typical Upper Bound
TypicalLo wer Bo und
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Note:
For more detailed technical information
regarding Luxeon radiation patterns,
please consult your Lumileds Authorized
Distributor or Lumileds sales representative.