I just bought a Mini Bow 2.5 gallon tank for Spit. As soon as I turned on the light it came on for one second and then it wouldn't work anymore. My husband took the bulb out and said it was blown. Did I do something wrong? I just put the bulb in and then plugged it in after i got the tank set up. I'm hoping that I can find another 15w bulb somewhere? Is this common with these or do you think there could be something wrong with the entire hood unit? I hate to take it all down and return the entire thing...thanks in advance for any advice!