First post on TFP, hoping someone can help. New homeowner/pool owner, pool appears to have been built in 2011/12. The 4 pool lights (3 pool, 1 spa) have always been out of sync since I bought the home last year, so finally began the process to figure out how to resync, which requires figuring out what lights you have installed. See attached picture for the one in the spa that I drained to get a better look, but it says Super Vision 100.0046. Any idea on what this is, how to take out, how to resync, etc?

I'm also trying to get that clear lens cover off to clean the algae, which I haven't been able to do with a fair amount of prying. I also can't take the whole light out of the niche - when pulling/turning, it wants to pull back in/rethread to the original position.
Again, any help at all would be much appreciated.

I'm also trying to get that clear lens cover off to clean the algae, which I haven't been able to do with a fair amount of prying. I also can't take the whole light out of the niche - when pulling/turning, it wants to pull back in/rethread to the original position.
Again, any help at all would be much appreciated.