Hi Racket,
Both lights are the same physical size. I took a few measurements today:
The lamp housing is 3-1/4" wide
The lamp housing is 3-3/4" deep from the back where the cord comes out to the front where the lens mounts. This measurement is with no lens in place.
The glass lens is 3-1/8" round.
The retaining ring/mounting ring that he lamp mounts to and then holds the lamp to the niche is 5-5/8" round Stainless Steel.
The outer trim ring/mounting plate says "Sunlite". Unfortunately there is no model number anywhere on the lamp or niche. Searching online I found a Pentair partners replacement parts catalog containing Sta-Rite Sunlite parts. My light looks exactly like the Sunlite light on catalog page 460:
https://www.pentairpartners.com/product ... US2012.pdfThe bulb base is indeed bayonet base.
Sorry I realized after posting I did not mention - these are 120 volt lights.
Is this an odd size lite? Any chance I can buy a LED lamp for which will fit my niche? I realize I will most likely have to replace the lamp/cord back to the breaker box.
Thanks again for any help,
Brian