Anglia Lighting LED Solid State Lighting
 

CREE Led Light Define Design Goals

LED Design Guide  

Click on the links below to follow the Cree Luminaire Design Guide.

Define Design Goals

With the lighting requirements defined, the design goals for the LED luminaire can be set. Just as when defining the lighting requirements, the critical design goals will be related to light output and power consumption. Make sure to include other design goals that may also be important for the target application, including operating environment, bill-of-materials (BOM) cost and lifetime.

Table 4 (below) lists the design goals for the example luminaire.

 

Characteristic

Unit

Goal

Notes

Light output

lm

810

Illuminance distribution

fc

Same shape as target; matching or better illuminance

Power (excluding driver)

W

23

Efficacy

lm/W

35

Lifetime

hours

50,000

Correlated Colour Temperature (CCT)

K

4,000

CRI

75

Circular opening

in

6

Maximum ambient temp.

°C

55

Commercial building with vented ceilings

High volume BOM cost

US $50

Table 4 - Design Goals for CFL Downlight Replacement Luminaire

 

CREE  
CLD-AP15.000
Copyright © 2007 Cree, Inc. All rights reserved. The information in this document is subject to change without notice. Cree, the Cree logo, and XLamp are registered trademarks of Cree, Inc. 4600 Silicon DriveDurham, NC 27703 http://www.cree.com/xlamp
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