The light in my spa has died, I was thinking of replacing it with an LED light. a) does it make sense to do? b) how hard is it? c) how much would it cost?

I have a Pentair control system with a Pentair Intelibright bulb already in my pool. But the put in a standard light for the spa.

My family likes to change the colors of the light, could I connect the light to the same control so it would change colors with the pool light.