LED housings compatible with existing niche?

[pumori]

I need to replace a pool light housing (Poolstar PLH-100-3). The light niche looks like about 9-3/4" across. Does anyone sell an adapter that will fit an opening this small? Looking to replace the housing/light with an LED unit.
Thanks.

 

[TomBorg]

I can't find any info on that fixture, but at 9-3/4" across, that sounds like a standard niche. But to be sure....

Pull out the light, and measure the distance between the screwhole at the top of the niche, and the center of the catch tab at the bottom of the niche. If it is about 9+1/2 inches, it is likely a standard (modern) niche, and just about any light should work. If it is about 8", then it is probably an older SwimQuip niche, and options for LED lights are more limited. See this thread for discussion about the J&J Electronics PureWhite and ColorSplash fixtures.