I had some pool guy who changed the lights for me but it blew off after 4 months or so. When we moved it I believe the pool was there for over 18 years. It is a nice vinyl pool. We made a lot lot lot of modifications to flooring, etc etc... through the years but did not change the Pool light only. We did over a year ago but it just blew off after a short time. I think maybe the light itself is bad? I think it looks like a Hayward to me.... stainless steel. Should we just change the entire thing itself or keep spending bulbs which I think he even changed the gasket but maybe it does not work well anymore?