I'm a newish grower buying two of the following (copy and pasted): IP67 waterproof 240w QB v4 lm301h with cree xpe2 660nm 730nm LG UV from Kingbrite and one of the same type in 320W. The two 240W boards will be for my 4xx7 and the 320W for by 2x4x5. I have the option of the newest version of...
