I made the LED pannels from LEDs I baught on Fleabay.
They are 100-120 LEDs per Pannel about 200-400Lumens per Pannel.
Farthest away they work is about 6 inches or they aren't bright enough.
Don't use them unless you need supplimental light or love to solder(takes about 1 hr. each to assemble)and have lots of time to kill at work like I do.
I added more as the plant grew.
Started out with 8 pannels vertically and 4 above.Added 4 more vertically latter.
LEDs were about $13.for 2500.
I use mostly star LEDs now.
Homemade-they are good for about 18-24 inches away.
My grow shelves are 18in.X 18in.x 4ft.
I'll have them on 3 sides vertically and over the top.
Total of 448 per shelf.Roughly 11.000 to 20,000 lumens depending on the LEDs I use per shelf.Stars are from 25LM. to 190lm each.9 +wavelengths of red and blue.