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My chinese lumanair uses lumileds 3030 and is 150lm/W ........... or is it?
Many Chinese LED high bay suppliers quote efficacy of 150 lm/w using Philips Lumiled 3030 2D LED’s. The data sheet produced by Lumiled give an LED efficacy of 157 lm/w suggesting only a 7 lumen per watt loss. This is mathematically impossible.
Lets do the numbers.
Heat losses. At a junction temperature of 86 deg C efficiency comes down to 140lm/W
Power supply efficiency of 90% this comes down further to 126lm/W
Optical efficiency of 85% this comes down to 107lm/W
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The lighting industry has been plagued for years with exaggerated claims. We aim to debunk that.
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| Asked: 10/4/18, 5:40 AM |
| Seen: 1613 times |
| Last updated: 7/15/19, 12:44 PM |