Being a reverse vampire I leave lights on. I found the cf buls work best, about a year on 24x7, then they burn out one dark night.
The filiment bulbs ask about 39 days, then go poof. LED bulbs like to flicker when they go bad.
I had gas heat and in the winter would switch out to filiment bulbs to heat and reduce use of gas heat as it was noisy to have it on all the time. It made a good deal of heat, but it ran my power bill up 10 bucks a month with 3 of them on all the time.