Need a replacement light for my spa. Actually, the one that was installed when I inherited it was rigged up from an outdoor flood light, held in place with electrical wire around the plumbing...!

My spa is about 15 years old, and has a plexiglass window by which the light shines thru. From the attached pics you can see that the lock ring attaches via screws to the ring on the other side.

Not sure where to look to find the correct light for this, or if I need to replace the plexiglass window with an actual light lens.

The spa is 120V, with no low voltage transformer for the light.

Thanks !

Inside diameter of the hole?

Outside diameter of the retaining ring?

inner diameter of hole: 5 inches

outer diameter of retaining ring: 6 1/2 inches

Thanks pageup !