I clone 2 full prop trays at a time under a SINGLE CFL. That's all you need.
I have also had fine results under 24h light.
If your have the choice between the flower room and a veg room to set this stuff up in, do it in the veg room.
If you are only running one room, set your prop tray up on the back of the toilet... hahahaha... that's always an underutilized growing area...