Lights watt veg periode

Ok, thanks for good reply and help. - Secretone

use the % control in vege area... find a intensity they handle... then lower to distance you want relative to footprint you want, and adjust light power back to that intensity at conopy -- a lux meter can do this type of function for $10.

might want 3 in that space for bloom -- just a guess wihtout seeing spec sheet. each one is good for a 4x4 give or take. might have some weak spots in coverage spreading 2 over 3M wide. or if lengthwise, have troulbe with width etc... bet they are 1000+ umol/s or so each fixture..

depends on the tech.. Find the umol/s for the lights. that will help you more than watts... think you are 2.3umol/s *J^-1 with those lights. They are pretty good -- maybe not what migrow made them out to be, but they are rocking nonetheless. in vege you want 600-800 par @ 18 hours a day without CO2 added for mature vegetative plants. Early on a seedling will need to be further away then canopy and a clone can't be anywhere near your vege light for at least a week or two, lol. Even then requirs a couple days to acclimate itself without wilting. So, you have 4.5 m^2. ~800X4.5 = 3600 umol/s ~600x4.5=2700umol/s Mothers/seedlings - ~300 x 4.5= 1350umol/s Clones - don't even try early on. 800 is likely too high for many plants in vege @ 18 hours per day, you'll want to react to how plants dig it before assuming anything... if you do 24 you need to consider that when calculating DLI. 24h is 33% more light than 18h. You may end up using 16 hours with that light in vege. I do and it saves electricity. They stil get their near-max DLI each day. Also, if moving old plants form old light to this new one... Start off slow, if they are a huge improvement over old lights. The intensity may not be like bringing them into sun, but you'll have similar symptoms the first day or two if not careful. Within a few days, you'll be going full bore with them. those things are damn near a DE-HPS. a 4'x8' would be fine with them (sorry more familiar with retarded imperial measurements for area). you want 70-100 umol/s per squar foot. If you are closer to 100, that'll be better for a bloom area than vege. As far as distance.. probably 18-24" with that intensity. 24-30 in vege area.. possibly down to 16-18" with fully mature plants not plants with limited roots. In bloom i'd lower it till i find trichomes are negatively impacted at the top. You may like the footprint at 12-16", but if it burns off trichomes off the top colas, that's no good. So, i'd base height in bloom as close as i can without seeing development of crystalization below canopy supercede the canopy's development.. that's bass ackwards. you'll likely get spooked at first using them. your plants may wilt if they are much stornger replacements.. just be patient and they'll improve.. move light further away intiially. if oy have a lux meter, it can help you measure intensity of light -- it is proportional, even if it doesn't tell you anything useful relative to photosynthesis.. it will tell you something when using it under the same exact light, however... if 20k lux is too much, it will be too much in future for many plants.. etc etc.. find where damage or negative symptomes occur and measure it. test it in future for sure, but keep track of the ceiling when you hit it .

Norcal Should I run the lights on full power on veg stage in these inches stage? Will do 17-18 hours for light every day. Im doing auto seeds

You could probably get away with one at the seedling stage at about 30 inches plus from the plant in veg crank I'm both on at about 24 inches away. For flower drop I'm to about 16-18. Happy growing!

The lights have % control.