How I built mine
The Diamond table lights are awesome and I would of bought one for my 9' table, but I did not want to pay over 400 bucks to ship it to Alaska. So I built my own light using info from their web sight which you can do to.
I called the local electrical store and bought 4 of the 8' fluorescent bulbs they call for with 2 fixtures for the bulbs. I used 1/4 inch finished ply wood and built a 2' wide by 8' long and 12" deep box and trimmed it and the corners out with oak and used 2x2 pine on the inside on top to stiffen it up. I attached 1x4's to ply wood to fasten the fixtures to on top. I used 1x2 on the bottom on the inside also to help stiffen it up and hold 2 of the 4'x8' diffuser panels if I want to use them.
The wood inside of the box was painted with chrome spray paint and it really reflects and provides great lighting. The out side of the box was given a walnut stain. I used brass decorative screws on the out side to fasten all of this together and they contrast nicely with the walnut stain.
I bought a heavy duty extension cord and cut the female end off and hard wired it to both light fixtures and ran it up to and across the ceiling and down the wall to a plug in. This is much easier then hard wiring into the receptacle and I just plug it in as needed.
I put 2 walnut stained 4' 2x6's on the ceiling and secured them to the rafters with BIG wood screws. I bought strong chain with stainless turnbuckles to adjust height evenly and added stainless carabiner's for a quick disconnect at 4 points. I then screwed 5/16 eye bolts into the 2x6 on the ceiling and hung the lights about 4' above the table.
I used a tape measure, cordless drill, skill saw, framing square, wood clamps and a plumb bob and above mentioned hard ware and lumber.
I am very pleased with the light. I have around 300 bucks in my light. You can do this so get the bulbs and light fixtures and draw your plans out on a piece of paper. It is very simple to do. I paid a guy 50 bucks to wire it because I am electrically challenged. Him and a buddy helped me hang the light.
Except for the walnut stain my light looks almost identical to the good pics "Miller" provided and mine is also in a garage.
Your just making a box and attaching 2 light fixtures to it and hanging it from the ceiling. Go for it!