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AppLiCAtiOn nOte

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intROduCtiOn

within the past year the leD industry has begun

producing white, high power LEDs in sufficient volume

that value-priced light bulbs are now practical consumer

products. In North america many retailers now have

leD bulbs as part of their inventory of lighting products.

most leD replacement lamps or leD light bulbs pose

significant design problems in managing thermal

equilibrium. These problems were always less severe for

gas discharge and filament lamps because these lamps

are inherently convective and dissipate heat through

the same path as the light. leDs, whose thermal load

The 3 snow cones

tAbLe Of COntents

Introduction........................................................ 1

a19 lighting requirements ................................... 2

Design Goals....................................................... 6

Estimate Efficiencies ............................................ 7

Implementations and analysis..............................10

conclusions .......................................................12

Reliance on any of the information provided in this Application Note is at the user’s sole risk. Cree and its affiliates make no warranties or representations

about, nor assume any liability with respect to, the information in this document or any leD-based lamp or luminaire made in accordance with this

reference design, including without limitation that the lamps or luminaires will not infringe the intellectual property rights of cree or a third party.

luminaire manufacturers who base product designs in whole or part on any cree application Note or reference Design are solely responsible for the

compliance of their products with all applicable laws and industry requirements.