are they 35 or 50w bulbs you're using? is the transformer rated for the watts you're using. just replaced all the shower light transformers in a hotel as the boss was fitting 50w bulbs instead of 35 wattt ones. the tranbsformers just gave up. also found a kitchen with ikea lo voltage lights and the owner had replace the 35's with 50's. The lights came on for 3 to 4 minutes then the transformer trip blew. just a thought. Cjeck what the power output on the transformer is..
john, January 2011