Best LED's?

well not sure if 3 year old threads are all that worthwhile. even mars is several generations beyond that

smokehighcanada said:

evening brothers . ...my profile pic is lite with Mars hydro Cree 256...will up load pictures of whiteshark and d.candy. at 11days flowering under 256cree . .

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Hello and thank you for sharing your knowledge.
I am a complete newbie so started off with very basic/budget equipment. I have a mars 600w. I am growing 4 plants ( too many, I know now )
I am considering buying a cree 256 or getting the mars pro 2 1600w. At the same time I have thought of buying another Mars 600 and hang side by side with the current 600w and see what happens. I need to do this soon. Plants just started third week flower.