Built a new light using horticulture lighting group quantum boards which the 2 big ones are now under as well as some others. The light is incredible it covers a 4x4 flower tent no problem and will be building another soon. It's also very easy to build and cost half the price as the pre built HLG 550. If anyone has any questions on how to build their own fixture i would be happy to help although I'm no expert it's pretty straight forward. This round has been a struggle trying to dial in the drip system . Right when I get shit dialed it clogs or leaks it's kind of a nightmare considering it was supposed to make things easier for me. Maybe I need to use thinner liquefied nutes or maybe the blumats are just shite.