So, just speculative this - not planning on abandoning my LED setup just yet!
So, general consensus of opinion is that HPS/MH lighting is still the best way to grow if money/space/environment are pretty good. LED appears to be a good starter option for a number of reasons, mostly money, but am wondering if there is a good and safe option for HID/HPS/MH in a small space with ventilation limitations?
Ebay do a number of 150W digital ballasts - often sold in a basic kit with a reflector. Could you get away with that in a small tent, around 140cm high or would you not have the headroom? I'm sure it's no coincidence that I don't see many peeps growing under less than 250W with these kinds of lights so assuming it's impractical on a number of levels?
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