Where is the heat? That is where the problems will be, The heat in flourescent luminaires moves from the lamps to the sockets and the ballast.
I am seeing more and more problems with ballasts causing heating problems including the complete decomposition of plastic fixture boxes.
An incandescent bulb is hot above the base. IE you unscrew a hot bulb and you can often hold the base but the glass burns your fingers. CFL are the oposite as are PL lamps which also have a heat producing ballast which transmits its heat into the outlet box. Lots of the new energy efficient luminaires are reworked incandescent luminaires.
