Quote:
Originally Posted by Ether
Two different LED bulb models by the same manufacturer. Packaging says:
bulb1: 800 lumens, 2700K, 150 mA @ 120V, 8.5 watts
bulb2: 800 lumens, 2700K, 120 mA @ 120V, 10 watts
Can someone explain what's going on here?
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Interesting my first thought was different efficiency emitters for the different models could account for the same light output with different consumption. but the math on the wattage doesn't add up.
The other question is one a dimmable and the other not?
I had an interesting experience recently when I installed a non-dimmable LED bulb in a fixture that was connected to a lighted switch. Turned on the switch and everything worked fine. Then I turned off the switch and periodically the bulb would flash on for a very short period. Scratching my head and then looking at the lighted switch the light in the switch would flicker corresponding to the bulb flashing. I later put a dimmable bulb in that fixture and the flashing stopped.
In retrospect I concluded that the slight voltage leak through the switch's illumination allowed the capacitor in the non-dimmable bulb to charge to the point where current would flow through the LED. It would then drain the capacitor, the light would go off, the capacitor charge again and the cycle repeat.
So a dimmable bulb would have higher consumption at the same light output due to the added control circuitry's power consumption. But that of course does not explain why the math doesn't calculate out.