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Is there a general rule for how many cobs per sq ft for flowering six?
Is there a general rule for how many cobs per sq ft for flowering six?
Yeah what toaster said is what i have also read.30w a sq ft.so im running mine @35w and using 12 in spacing so ill be above the 30w rule but still driving them soft for better effeciency and longer life,in theory lol.i run my shop at 50w per sq ft now so if these compete at 35w ill be happy as hell.You want at least 30W/square foot. You can run a single COB at that power or you can run a COB at 150W and use less of them. Lower the power, higher the efficacy.
About 175 to 225 watts from what I have seen on a multi meter. I used one next to mars refletor series, and the cob easily outperformed the mars. The exact model you have pictured there. It is great for a first grow on a budget. That side of the plant was about 5 to 6 inches taller than the mars side. I run high pressure aero, and I'm bout to build two lights using the 3590s. Five per 43 inch by 6 inch heat sink. With two 200 mm fans. Mw hlg 240 will power 5 cobs at 50 watts each. Running the 36 volt@1400 mah. Thanks to supraspl, and realstyles. I have a background in electronics, so building this was as simple as ordering the parts. One question. What about my extruded heatsink from heatsink usa ? It's not flat, and I was wondering how much of a difference it makes on the thermal transfer if the surface you mount the cob to isn't flat ? Also, after this grow, i would like to build 4 more lights for a total of 30 3590s at 50 watts each over 32 Sq ft. I also plan on making a screen to help get even light distribution to most of the buds. Is this overkill ? Would 25 cobs be a better idea with the scrog ? I ordered my cobs, cob holders, reflector holder and reflectors from Jerry @ kingbrite. He was very helpful and the reflector option with all listed above and the 3590 is $48.10. The 100 mm lens option with the cob and cob holder is $51. Dhl had everything here in six days from the day I ordered. That was for 3500 kelvin 3590 with the cd bin. I also noticed where some of you are using 55 to 60 rh in your grow room. With led lighting you only need 40 percent rhythm the whole grow. I noticed more nutrient uptake and faster growth when I brought my humidity down. This lowering of humidity may help with oxidation on the aluminum heatsinks. Again, shout out to realstyles and supraspl for your amazing contributions to the led growing world.
If you are going diy you should just line atent with strips of these.
They cost very little to run and there are some grow threads on here with expensive versions of these same leds pulling pounds of top shelf out of a very small area because it has top to bottom lighting, no larf.
The lumen per watt only matters in lighting cost and no matter the lumen per watt you are still going to be using less energy than a big grow light even if you have to use 6 different 12v power supplies. The led strips I linked were just ones that I found to link, I would shop around for the brightest and best deal.The best bin versions of hose strip lights you speak of is about 75 lumens per watt, a little better than a mars hydro reflector ( 55 lumens a watt ). But the cxb 3590 at 50 watts is abut 173 lumens per watt. So, do some research before thinking that something is better. Check to see the efficiency of the light, and that will tell you how much of your power is being converted to photons. The best efficiency that I have been able to find data on is the cxb 3590. There may be a few smaller chips that will yield 180 lumens per watt, but the fact that you don't have to wire up many cobs is another obvious advantage. That and the meanwell Driver solution. All top shelf build components make for one bad ass light.
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