All kits feature full-spectrum, high efficiency white light Quantum Board®. Choose R spec options for our latest module powered by Samsung LM301B and Deep Red LED 660nm.
horticulturelightinggroup.com
these lights aren't prebuilt, but are very simple to assemble and come with everything you need..
This one is prebuilt
https://horticulturelightinggroup.com/collections/lamps/products/hlg-550-v2-rspec but is 200$ more than your budget.
to build the same one it is much cheaper
600W LED Module with 4x QB288 V2 Quantum Board using Samsung LM301H LED
horticulturelightinggroup.com
all you need is a pair of wire strippers a screwdriver and wrench, and a little patience. The kit comes with everything. Plus they are much better quality lights and will last a very long time. I think mars has finally put out a decent product just not sure if they're worth it.