Re: LED lights in salt pool dead within 3 years, Replace with ???
We specified Hayward Color Logic LED for both pool and spa during our build in 2007. Very special the first night we turned them on.
But after that first big swim party, they were very rarely used. I doubt if they're on a total of 4 hours during the entire summer and almost never at other times of the year.*
About 3 years after installation, one of the colors on the spa LED light went out -- it's kind of hard to tell unless you cycle through all the combinations because it's just one element of several colors that are blended together to produce "hazy night in violet' or whatever name the company assigned it. I finally noticed it because the spa seemed just slightly less luminous. Anyway, we've done nothing about it. No issues with the pool light.
All that fuss and a thousand dollars extra to have a fancy light show ... and I found myself and most other people just feel more comfortable swimming in a brightly lit pool, and that means, uh... white light. 
Also to note, the LEDs being marketed now may-or may not-be as well made as those sold 10 years ago. Manufacturing sources can change over time and I doubt any large company would be forthcoming if at some point they chose to go with Supplier "B" to save $1.00 per unit wholesale cost and they found they were selling more LED replacement kits because of the lower quality.
* In N. Calif. swimming after dark is not as pleasant as it is in other parts of the U.S. or elsewhere. Most evenings the temp drops from 95-100° F. at 5 PM into the 60s--or even lower, by 11pm, with low humidity. Brrrr. Kids don't care, of course. But when a group of adults climb out of an 86° F pool into the night air, that pretty well puts an end to the idea of a late night beer poolside. "Where's the hot chocolate?!"
16'x29' free-form 14K gal IG gunite pool; SWCG & sodium hypochlorite 8.25%; Hayward SwimClear C4025 cartridge filter; Hayward SP3202VSP TriStar Variable Speed Pool Pump; custom test kit based on Taylor K-2006C; city; PF:8.6
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