Update: Hackaday did a teardown a few months back, detailing how the Feit battery backup light bulb works.
I don’t know if I could tell if a 200 gram light bulb weighed an extra 20 grams. That makes sense, as it doesn’t seem to weigh much more than a normal LED bulb. That’s approximately a 2000mAh, 3.7V LiPo battery, which is in the neighborhood of 20 grams. If we go down to 2W on battery, that means 7Wh. That’s approaching the watt-hours of a 1.5Ah M12 battery. The bulb uses 8.5W on line voltage, so lets say that it uses 4 watts on battery. For the light weight and long run time, it’s got to be Li-ion or LiPo, and given the strange shape they have to deal, with probably LiPo. With a 13.7 year lifespan, what kind of battery can they be using? Based on the weight of the bulb, it can’t be a very large battery. Emergency rechargebal inverter bulb 12wt up to 4 HRS battery backup2 4 hrs Bulb Emergency Light. I’m kinda curious about what’s inside this bulb. A few of these bulbs placed in strategic places, like the stairway, might make navigating in a power outage easier. I’ve been stuck down there before, feeling my way around in the dim light of a battery backup LED. For instance, our basement has no outside illumination, and so when the power goes out, you are in total darkness. I can definitely see the utility in this type of bulb in a few locations. Amazon has what appears to be the same bulb for $11. Battery & bulb Batteries n Bulbs Superstore Over 25000+ Batteries and.
Battery backup light bulb full#
(I wonder if your hand or body could close the circuit pulling an Uncle Fester and lighting up a bulb in your mouth might be a good party trick – but do NOT try this at home!)Īt one of my local Home Depots, this bulb is running for $13, but if you look at the website it’s full price at $15. Emergency light bulb builts in 1200mAh battery backup can lasts for 4-5 hours. It has to be in a closed circuit, or otherwise you couldn’t turn the thing off it would just come on when you turn the light switch off or removed the bulb.
Battery backup light bulb plus#
Thinking about it, this makes sense that it operates in this fashion. Check out battery recycling & light bulb recycling at a Batteries Plus store near you. It also will not provide the stated 600 Lumens at that point, but hopefully the output is still enough to navigate by. When the power goes out, and only when the bulb is in a fixture that is still turned on, will the bulb run off the internal battery. It obviously needs to be in a light socket that is powered on to charge. Do not confuse this with E26 which is the type of base - E for Edison and 26 is the standard North American socket size.Īfter a little reading I figured out how the bulb works. So 21 means the bulb is 2.625″ in diameter. Evidently “A” refers to the shape and “21” the diameter in 1/8s of an inch. I had no idea what A21 meant until I looked it up.
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