Not totally DIY, but a nice little Mars Hydro hack, IMHO. Pulls 208w at the wall and should be good enough for keeping plants ticking along and early vegging. Time will tell I suppose.
2nd hand Mars hydro = £60
8 x CLU048's = £64
I already had the rest of the materials required on hand and the conversion took about 3 hours, would've been quicker if I'd had some small self tappers
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EDIT...........Its runnin much cooler than when it had all the mono's on it, which I was worried about, but I've defo got a little extra capacity on the drivers. I may add either a smaller cob to each driver, or a small cluster of mono's