As part of our kitchen remodel we recently had some flexible track lighting installed in our kitchen. We bought the fixture (Tiella track kit with 2 pendants and 4 spots) from Lowe's and the electrician for the job installed it. Problem is that it turns on fine and then after about an hour or a little more just turns off abruptly...it stays off for 15 minutes or so and then goes back on. Almost seems like it's getting too hot and turns itself off; cools off and lights up again. It's 150 watt transformer and we have 150 watts worth of lights hooked up. Any suggestions would be appreciated. We switched out the transformer and it does the same thing.

Thanks,

Kinsey