Hope for 0.5 grams per watt of light. That's real watts, not 'equivalent watts', read the fine print on your CFLs, somewhere it will show what real wattage they are. Be very happy if you exceed 0.5 grams/watt, and don't be disappointed if you don't yield that much. The 'holy grail' is 1 gram/watt, but that's if everything goes perfectly, and I doubt many achieve that. It's better to be a pessimist and happily surprised than an optimist and totally disappointed. I have never reached 1 gram/watt, personally, although I am edging closer. I'm always happy to reach half that, and consider anything beyond that as a bonus for doing a good job.
jamstigator Reviewed by jamstigator on . Help!!! I'm really new to growing - does this look any good and is it to early to tell if it's male or female? Rating: 5