This might apply to regular plaster but here is my experience and I hope it helps someone. I still love my choice to go with LEDs but if I could have done these modifications it would have been absolutely perfect.
1. Position them so that they shine away from your porch or main area of congregation.
For example if you look at my diagram below, the spa light appears as a bright dot when looking at the pool from my patio, while my pool appears to be a nice shimmering of light similar to what you would see with halogen. This will REALLY be evident when photos are taken, I actually remember one PB telling me this and I overlooked it on my spa for some reason.
2. Consider the dark spots caused by doing a free form pool with LEDs
The center of my pool is pretty dark because of the inward curve of my pool causing a separation in the light distribution. You wouldn't think it would make that much of a difference but it really does, and if I could do over again I would have used 3 LEDs and put one in the center.
Of course some people may think a dark spot isnít a bad thing it really does make it tough collecting pool toys at night.
3. If you have water features and youíre considering incorporating LEDsÖ. DO IT
I considered Fiber Optic light bars in my 3' waterfalls but second guessed myself thinking they would be over kill. Now Iím kicking myself because I canít add them and there was always a safe guard to just turn them off since they can be controlled by a separate switch. After looking at some YouTube videos and using my pool for a few days I really wish I had the option to light up my waterfalls for the kids and also for creating an ambiance for my company.