Here is the DIY light thread:
In my case I had a supply of aluminum (1 1/2 X 6" X 1/8" wall) which cuts the cost of building a light way down. Figure you are going to spend around $1/watt. Using top of the line LED’s you can run around 25 to 30 watts per square foot for good coverage and dense flower. I built mine as 4 individual fixtures so I can tailor a grow size without wasting electricity. Footprint is 22 X 36" and runs 240 watts at peak. Normally they don’t go any higher than 200 to 220 watts in peak flower.
cut to length
spacers cut
assembled heatsink
masked for white paint
Painted
Samsung EB strips attached using thermal double sided tape
Wired in series
And it works.
Cutter electronics was my source for the driver and EB strips. Hookup wire, thermal tape and an extension cord along with WAGO connectors to hook to the driver.
Example of one plant (outside for pictures). That was nearly a pound of flower.