Hello, we have a 8k-10k gallon 4’ deep salt water cement pool. One of the two lights kept going out. The repair company said the fixture wires are stuck in cement. They said the only way to replace it is drain the pool at least halfway to work on it. They want to drain it one night then work on it the next day. My questions are: 1) Is it reasonable they can’t replace it under water, 2) How high of a risk is draining it as needed for let’s say 24 hours, & 3) Any suggestions or advise? Thanks so much!