Yesterday I added more lights to my "garden". I searched for fixtures to complement my existing lights, but found they were too expensive. I ended up building my own. I made four fixtures and added one fixture at each end of the growbeds. Here are the materials I used to make the four fixtures:
4 - Bakelite twin lamp sockets, medium base
4 - 3/8" electrical nuts
4 - 4" aluminum dryer vent pipe sections
4 - tool 2 wire replacement cords
4 - electrical boxes with covers
4 - electrical box clamps
8 - 6" pieces of stailness steel wire (I used Orthodontic wire because that is what I had available)
8 - wire nuts
I first cut the corregated portion off the vent pipes, drilled 3/8" holes in the centers and bent them to be reflectors. I then drilled 3/8" holes in the bottom of the electrical boxes and knocked one end plug out of each box. I added the box clamps to the boxes and assembled the sockets, reflectors and boxes and tightened them together with the 3/8" nuts. Then I fed the cord end into the boxes and fastened the wires (white to white and black to black) together with the wire nuts. I Screwed the covers on and punched 2 holes near the bends in the reflectors on each end. I then bent the stainless steel wire to make attachment wires. I hung the fixtures on chains to be able to adjust the height of the lights over the plants.
For lights I am using TCP Compact Fluorescent Lamps 42W 6500K spiral glass medium base lamps. They seem to work fine, but if I was going to do it again I would get Mogul base sockets and 55w lamps.
If anyone has questions, I will be glad to answer them, (If I can).