Grow led, vendo kit lumatek hps.

without added co2, ~800-900 umol/s should be good. Becareful, this is a specification that is often lied about. Know the parts and the specs from the original manufacturer (for example: samsung lm301b diodes) If you understand the specs, you can't be lied to, or a the least the bad, unbalanced math will stick out like a sore thumb. Suggestion -- overshoot 800-900umol/s by about 25%. You will run them dimmed a bit at first, but if high quality they last ~60,000hours until 80% intensity (LM301b, not necessary all LED). So, after 60,000 hours you will have increased power by an equal amount and maintained same exact coverage and intensity of light for the entirity of that 60,000 hours of use. (.8 * 1.25 = 100%) So shoot for a light with ~1000-1100 umol/s. You'll run it around 75% for a couple years. quick math to ensure they are not driving the diodes too hard -- this ruins advertised efficacy and longevity if they do - Watts (real) divided by number of diodes. If the samsung diodes are used, the most efficient white light LED out there, this watts per diode should be less than 0.4watts. If this value returns a higher value, view all specifications of that light with GREAT speculation.. in fact, assume it is lying if it still tried to advertise a ~2.8 umol/J efficiency.