Check it to see if it is rated and for how much current/amps or how much wattage it can handle. It might be stamped on the y connector itself or on the package it came in. if it exceeds the ratings on both of your bulbs you should be ok and I concur with FunkyMonkey on the ground thing.
Also, make sure that total current draw does not exceed the circuit you are on.
most household circuits are 10 to 15 amps so if you're on the same circuit with lights and fans and such, make sure they are not exceeding the circuit or you will be fucking with tripping breakers all the time.
bonsaiguy Reviewed by bonsaiguy on . Need some opinions! I found this today and i bought it, i was wondering if every1 thought it would be safe to run 2 CFL's in it, or if they think its a fire hazzard, theres a pic attached, and it will be attached to an extension cord. Rating: 5