t's working good for me so far. I replaced a 100w incandescent with this LED bulb 18watt 1800 lumens. It's instant on, stays cool, and full brightness instantly even in a cold garage. I like the fact it's 4000k (bright white) color temperature and it matches the light output of the incandescent. Try and find a 100w LED in bright white 4000k . None of the big box stores even come close (I've looked). If your lucky you'll find 100W 3000k (no thank you). As you can see the sanlibang LED isn't a full glass bulb like an incandescent. The only thing that's SLIGHTLY different is the LED doesn't fully radiate light all the way around like an incandescent. For me I like the LED better as mines in a garage ceiling (pointing toward the floor). I don't care if it lights up the ceiling I want it to light up the rest of the garage and IT DOES REALLY WELL! Be aware it's a little bigger than an incandescent and heavier (typical for an LED with these specs)...