LED tech itself isn ' t much superior to HID lighting the keyword is COB . Recent COBs are nearly twice as good as HPS , at a reasonable wattage . That means if you compare a 300 w COB setup and a 600 w HPS , the results will be nearly identical . More so if you include HVAC in the final footprint . The reason the COBs are so much better than everything else is because they ' re packing over 360 diodes on a single chip and driving the entire chip at 4080 w . Citizen CLU 0481818 24 $ and Vero 29 Generation 7 25 $ are both the best options right now for a light . If an LED you ' re looking at has redblue light , then skip it because raw photons blasting chlorophyll peaks . In a few weeks there will be a chip that will match the 1818 but will cost around 18 $. Cree hasn ' t come out with a new series in nearly two years , so they are behind the curve and I don ' t recommend CXB 3590 ' s since they ' re 35 $ a piece and slightly worse than the two chips above . The only catch is you have to build the light yourself which is easy since there ' s a ton of Youtube videos you can learn from . Stick with 3500 k 4000 k 80 CRI for universal vegflower and you ' ll do just fine . You can order Vero 29 Gen 7 make SURE it ' s GENERATION 7 from searchen ? FVffecd 511 stock 1 and the Citizen chips can be bought from cobkits . com .