Short in my fixture from spitting fish...

[parkinsn]

I am not familiar with the Teck lights but some lights do have thermal trips in them so if they get to hot the will turn off the fixture. Is it the switch or does the light feel hot? Also maybe check the pins on your lamps to see if they are rusted from water hitting them. Its possible that they are not making good contact in the socket and when you are flicking the switch the light is moving slightly and getting them to make contact. But what the heck do I know, just something to check.