My pool light will come on for a short period on time and then turn off. Throughout an evening it may do this several times. And then it gets to a point where it will not turn on at all. It had not turned on in such a long time, we were going to replace the bulb. However, my husband reset the breaker last night and voila - pool light. It was on for less than a minute. DH seems to think it has something to do with it getting too hot and needing to cool off. That seems plausible enough. we both agreed to ask you for help!