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How does the fluorescent light bulb work7/29/2023 Turn it on if you have one backwards it will be obvious, turn off rotate the bulb 180 degrees and you are good to go. Some lamps are frosted on these I have found the heat sink is usually attached on the back side and can be seen just reverse the above directions so the heat sink goes to the fixture side. In both cases 90 degrees until they snap in place or lock. I pull the tube out of the foam or box remove any pin protectors and then look to see which way is the front if the front is away from me I rotate the lamp towards me, if the front Is pointing at me I roll them away. I usually remove the fixtures to require them and have them face up on my work bench. You can turn it either way but you want the LED’s to be facing out so it depends which orientation you install the tube. If you want to get rid of the infamous LED eyeball-burning glare, at the expense of less light, install them "upside down". Most LED tubes are aligned so the light shoots out the way the tombstones come out. Unfortunately I'm not at my site, so I can't give you a rogue's gallery of different tombstone pin paths. Once the first tube is out, stop and take a close look at the tombstone, and see how it is designed to work. The upshot is you really have to "go by feel" - remember you are holding onto a glass thing, force hard enough but not too hard.įor what it's worth, the tube ends will have a "dimple" perpendicular to the pins, so when it's square into the socket, the dimple is lined up with the socket. Some of them pull straight out/down, although 60 degrees of rotation will likely make one end pop out.Some of them only allow about 60 degree rotation.Some have channels or cages that require exact 90 degree rotation. I have replaced tubes on easily 20 different kinds of fixtures with a wide variety of tombstones (that's the lamp socket the tubes go into).
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