To start my stuff indoors I built light systems out of
unistrut
conduit
lighting ballasts
flourescent bulb fittings
I mounted the bulb fittings onto small rectangular metal pieces then stuck 2 of those on each 4.5' section of conduit.
Then attached each section of conduit with handy little unistrut conduit clamps to a couple of pieces of unistrut running perpendicular to the sections of conduit. These clamps hold the conduit and are designed to interface with the unistrut. It's something electricians use and can be found in the electrical section of any big box hardware store.
Then I mounted the ballasts on those same pieces of unistrut and wired them into the light sockets and electrical boxes, which were again mounted on the unistrut; and then plugged the whole thing into a smart switch.
Total of 10 4' bulbs on one set and 12 on the other (I built 2 of these), although you could just as easily use more or less bulbs or longer or shorter. All depends on the space you have available, I guess..
The unistrut then mounted onto legs with handy unistrut fittings (starting to see why I used the unistrut?), which allowed me to move the light set up as stuff started growing.
Here are the part lists if anyone wanted to do the same
ballasts: If anyone is actually interested in this let me know and I'll pull the model numbers. I used ballasts to power 4 bulbs each on the set of 12 and 2 bulbs each on the set of 10.
light sockets:
Leviton 13357U - T8 or T12 - Turn-Type Lampholder - Medium Bi-Pin Socket - Non-Shunted - For Programmed Start Ballasts - Standard Profile - Light Sockets - Amazon.com
conduit- 1/2"
mounting plates- used electrical box covers and cut them with a grinder into 1 x 2" rectangles. I'd recommend steel over aluminum, as the epoxy didn't seem to work well with aluminum. Ditto on substituting a plastic pipe or conduit for the normal old metal electrical conduit.
epoxy- I just used 2 part gorilla glue epoxy to mount the light sockets onto the conduit, but I imagine anything designed to bond metals would work just fine.
bulbs were just T-12 Philips daylight 4100 K 4' bulbs, but you could certainly substitute....