Doesn't sound like a good idea, especially if that's the only overhead light fixture in your bathroom. You are not going to be a happy camper when you need a regular light in the bathroom for performing your daily ablutions. A 15 watt lamp in a ceiling mounted fixture is going to be pretty dim without the safelight filter. With the safelight filter, good luck! It's enough so that you will find your way around and it's perfectly fine for darkroom work, but don't try to do anything else. Can you see yourself shaving under that light? Hope you have a good supply of bandages.
Incidentally, while the OC safelight is fine for most enlarging papers, there are a few that don't do so well with it. A red safelight, while a bit harder on the eyes, is much safer. So instead of the OC filter, you might want to consider
this one instead. It's safe for all papers without exception.