Luxeon Flood

7

Document #: DS24 (10/05)

Representative Spatial Radiation Pattern

Average Lumen Maintenance Characteristics

Lifetime for solidstate 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 18Up 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.

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Angular Displacement (Degrees)

Batwing Radiation Pattern (without optics)

Figure 7a. Representative Spatial

Radiation Pattern per Luxeon

emitter White.

Figure 7b. Representative Spatial Radiation

Pattern per Luxeon emitter for Red, Amber,

Green, Cyan and Blue.

Lambertian Radiation Pattern

Figure 8. Representative Spatial Radiation Pattern

per Luxeon emitter for Red and Amber.

Note:

For more detailed technical information

regarding Luxeon radiation patterns,

please consult your Lumileds Authorized

Distributor or Lumileds sales representative.

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Angular Displacement (Degrees)

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A ngular Displacement (Degrees)

Typical Upper B ound

TypicalLo wer B o und