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Thu, Feb 21, 13 at 3:43
| A friend of mine told me that LED light's brightness would decay over time, Is it true? If it is true, I might consider installing 9 LED recess lights instead of 6 in living room. Thank you very much. |
This post was edited by janesylvia on Thu, Feb 21, 13 at 3:45
Follow-Up Postings:
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| Yes it will. However, the rated lifespan quoted for LEDs is the time taken to decay to 70% - more than 10 years. Other lights also decay. For instance CFLs gradually lose output over a shorter period of time (in some cases < 1year). Putting in extra lights is not the solution. |
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- Posted by janesylvia (My Page) on Fri, Feb 22, 13 at 3:48
| Thank you very much, David. |
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- Posted by landscapelighting (My Page) on Tue, Mar 5, 13 at 17:57
| I agree putting in extra lights is not the solution. Most LEDs are rated from 25,000-100,000 hours at L70. L70 is a 30% decrease in light output. The human eye can start to tell the difference when the light has dimmed 30%. This is reason why L70 (lumen depreciation to 70%) is important. John Cambruzzi |
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