These are powerful custom built LED Grow Lights. If I recall correctly they draw just under 300W each - I have 16 of them.
$100 each.
4+ for $90 each
8+ for $80 each
All - $1,000 ($62.5 each)
Each light has adjustable light spectrum output.
The cost about $250 to build when new (several years ago).
I used them for maybe 4 years, and they've then sat for another 4+ years, so it's time I get rid of them and they move onto a good home.
Best I ever got was roughly a pound and a half per plant when I was growing my own greenery. But, they would also work incredibly well for starting fruits, vegetables, etc... to extend the grow season of anything you want to grow.
Being LED they put off substantially less heat than ballast lights, etc. I never needed AC (just an intake and exhaust fan and I had 12 or more of them running at a time in a relatively small room).
Lights are in Cripple Creek, but if you are 100% serious about purchasing them I could meet you down in / by the springs.