I bought a squirrel cage bulb (one of the old time multiple filament bulbs) recently and on the box I noticed that it said for outdoor use only. I was wondering if it is safe to use indoors? I don't see why not I think its because it has an energy rating of E and possibly its due to some EU regulations for selling them or something but I just wanted to double check if anyone knew anything about this. I've looked on google and not much comes up on the subject. We'll use the light on rare occasions and it's mostly for decorative purposes than anything else but I didn't want to use it if possibly it may cause damage or void insurance etc.