One item we get a lot of questions about is when a pool light is properly connected but constantly trips either the circuit breaker or the GFI device for pool lights. When you encounter this situation there are typically only 2 scenarios that cause this.
Pentair has a line of underwater pool and spa lights that they sell under the brand name Intellibrite 5g. Both of these lights have inside of them a part that they refer to as a color LED light engine. This part consists of both computer chips and led chips that control the LED's and the color and shows that are projected out of the lights underwater. Over time these boards will eventually fail. When this occurs, consumers have two basic choices: 1 - Replace the board with a new one or 2 - Replace the entire light fixture.