I am replacing an old Paragon Slimlite pool light with a Hayward colorlogic 4.0. I bought the new light and put it into the old niche. It doesn't fit perfectly but it does go into the mounting screw on the top and is very sturdy. But there is a small amount of space at the bottom of the light(maybe 1/4"). Can I just leave it like that or is that a problem?