I have 3 55 watt pl-l lights vertical with reflectors in the corners of my tent. Have 100 watts of LED overhead. Works out good, just a lot of wires and ballasts to keep track of. ahsupply.com is where I got them.
55 watts is the most efficient of the bunch. Am supposed to get a uvb meter today and will test them for uvb production. Should be a lot at 1 inch away, but am curious how much at greater distance. The lights have around 10 inches of good light from the bulb for flowering.