First, are you a beekeeper? If not, are they honeybees or some other kind of bee?
From the sound of it, they are wild bees in a tree. If so, a beekeeper would remove them for you if they are honeybees. Otherwise, a pest control company or a brave friend or neighbor may do it for you.
Beedog, check your post. I think there may be a couple of typos.
Sorry for the typos, I was really in a hurry that I even forgot to ask if he/she is a beekeeper. Anyway, I had my experience with my bees during dearth periods that they frequently enter inside the house each night and fly around the light bulb. I observed that their unusual flight during the evening and late nights indicates that the hive is running out of food stores and that they need to be fed. That was my observation and experience. Still on TL's situation, it could be just wild bees who are attracted to the lights.