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i use a bunch, from 2700k to 6500k, from 23 watt to 42 watt
as far as i can tell the spectrum doesnt matter much, ive been told 2700k will have more foliage and smaller stems in veg, and vice versa for 6500k,maybe, but it's not enough to make a nopticeable difference.
i start with a single 23 watt bulb on a fresh seedling, then as it gets larger as more, you can have as little as 75-100 watts of light on plants the size of mine IN VEG and get away with it. If you switch to flower in 4-5 weeks or less you can get away with training and flowering under t5's and pull off more than pleasing yeilds for the wattage.
however there is a reason im moving to an HID for these plants, i got lazy and just let them get too big
Decided I'm not going to modify the wiring of my house...
Because I found this on sale for $88 brand spanking new.
400 watt MH/HPS switchable and dimmable. 38,000 lumen MH bulb and 54,000 lumen HPS bulb and bat wing fixture, along with a grounded mechanical timer. Felt like a steal ....ballast is 120 volts so I won't have to modify anything in my house lol
Ill post up some more pics when I get it all setup
EDIT! Its fully setup. Good temps (upper 70s) at the canopy after being on over 90 minutes and the light is about 10 inches from the average top height.
and yes, those two wires have been neatly zip tied and routed up the sides of the closet . Ballast and any outlets or timers are now up above the lighting fixtures as it should be
HIDs for years dude! Nice score. I got a little excited about the ballast, but then you said dimmable. So then I knew it was electronic. dont get me wrong my electronic dimmable ballasts are fucking tops amazing gear. But if you got a 400w magnetic you coulda scored in a different way.
I admire the work you do and the ideas you have about lighting, using the least amount of energy and shooting for top yields in the watts. So then you'll appreciate 400w cmh setup, 1/3-1/2 the BTU of HIDs which is the equiviliant heat of running a 150W MH not to mention that ceramic yields could be as high as 1.5g per watt which could give you well over a lb when dialed in off 400w.
Also leads me to my next question I came back to ask if you thought some 26w 5000k cfls around the perimeters for an extra 100w-200w for 4 sides of my CMHs boundary
Im expecting about 5-6 ounces this go, but next round with proper training and a single long vegged plant im hoping to get closer to 8
as for 1/5 g/watt under 400 watts, would be quite difficult, at 10 inches a 400 watt maybe 90% as intense as a 600 watty,. but at 18 inches its onlyabout half as intense (with new bulbs, different brandsobviously decay at different rates), the lumens drop off at a much quicker rate when gaining distance from the fixture when you go down in wattage for HID. 1g/watt is doable under a single 400 watt fixture, but its a LOT easier under multiple 400 watt fixtures daisy chained or under a higher wattage fixture as the lumen intensity just reaches farther, and if using multiple lights, it overlaps.
i mnay read 30,000 lumens at a foot from a 400 watt, and 36,000 a foot from a 600 watt, but 2 feet from a 400 watt i read like 11,000, and 2 feet from a 600 watt ill still read almost 20,000 lumens
And about CMH, have never used a ceramic metal halide, i know they run cooler, but thats about all i know lol.
Really pleased with how quickly they are maturing under the HPS had some slight light bleaching start around the edges of a few leaves on the dutch kush but i caught it early and backed the light off a couple inches. Is about a foot away now
and half of my old flowering setup has been retired to my cacti
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....ballast is 120 volts so I won't have to modify anything in my house lol
