Please advise us if flood lights can be used inside a house including the bathroom vanity areas?

Thanks for your time!

God Bless You All! :)

It depends on how close to the ceiling they are and what the rating is for the fixture.

If you are actually using a flood light fixture and follow its watt rating then that's covered what is it you are actually doing and location to side wall and ceiling for the fixture.

Rule of thumb if you can put your hand at the wall or object close to it and hold your hand there without it getting to hot then the heat factor is also covered.