Aquadoctor has multiple options for your pool light leak issues. 

We seal conduits the right way standard every job, no amateur hour putty in the conduit. 

We rarely recommend a new light niche- it is rare a niche is needed to be replaced and if it is and not properly downsized that is a reflag you have an inexperienced pool builder performing work on your pool. 

We have custom adapters we make ourselves that will allow you to upgrade to a color changing LED Pool light with no need to modify the light niche (in most cases, sometimes the shallow hayward light niches need to be reordered with their own type of light; we can get any lighth you need at contractor discount and install it for you the right way so it doesn't leak because most pool builders don't know how to seal lights correctly. 

We stock the best resin fillled lights that other companies don't believe is the best engineered innovation to come to pool lighths in a while. It is. Resin Filled Lights prevent the failure caused by water intrusion and we get our lights custom ordered to be resin filled and long lasting. They come with a 2 year warranty.