No, not the mars/galaxy 300! If you are going that route of LED then look at Viparspectras line. Cost slightly more but 10x better.
What size footprint will you be making?
@Olive Drab Green is the king of Visparspectra far I'm concerned. He is working the 450 model like a champion. Check out his grow blog. I am impressed by this line of LEDs cheap and works well.
Not a COB but next best thing if dollars are tight to start with.
8 bar T5's are cool with the spectral control but lack of IR/UV and changing bulbs keeps me away. The price a good 8 light t5 costs I can step into something better. #IMO