Pool builder installed a small light niche which is incorrect one for a Pentair 5g light. I didn't notice until after shotcrete. So they came out and cut wrong light niche out and installed a large light niche. I was watering the repaired shotcrete after they installed a large niche and I took off the cardboard cover off the new large niche and noticed its a Hayward. I found a thread from a while ago saying 5G light will work with longer screws??