We recently had our pool renovated, including a new pebbled finish. When we asked about getting an LED pool light to replace the existing incandescent bulb, we were quoted over $900 from more than one contractor. Realizing that there had to be a retrofit option, I turned to Amazon and researched a bit while my pool was empty. Here, I stumbled upon this bulb and found the correct gasket for my old 'American Products' fixture. Though the fixture is quite old, everything but the gasket appeared to be in good shape and the old bulb worked just fine. Installing this bulb was a snap, though I did watch several different YouTube videos as well as reviewed the included instructions. The thing to remember is that the fixture must be water tight, otherwise it could be an electrocution hazard. Bucket test the fixture before you reinstall it in the alcove! If it's water tight, there should be no bubbles coming up from the fixture. I would also recommend using a non-contact voltage tester to ensure that the fixture is completely safe before jumping into the pool.That said, this bulb is quite impressive. Though the series of switches on-and-off to control the mode is hard to get the hang of, it is effective and the output is stunning. Even though my new pool finish is pigmented blue, most all of the colors are vibrant and distinctive. Even if you're buying this bulb solely for the energy savings and/or longevity that LED provides, this bulb delivers -- in pure white mode, it's at least as bright as the incandescent it replaces.This bulb is money well-spent and so far, I'm glad I bought it.