Correlation between Watts/sqft and GPW

within efficiency of 50-60% with the cobs

just trying to get an idea from you guys on what you think is the ideal power to cover a 4x8 table. I'm thinking about 50w per sq/ft at around 50-60% efficiency(hopefully) for a total of around 1600w per table. Some people said 1200w is plenty but I prefer to throw as much as I can efficiently.

What I'm trying to figure out is the correlation between w/sqft and at what point gpw will begin to fall off. If I throw 30w sqft and get 1.5 gpw can I still get at or around the same gpw by upping the juice to 50 per sqft

lower W/SF > higher GPW

50W/SF of cobs is a shitload of light expect to be on the higher end of g/SF but on the lower end of g/W

i agree that 1200 is plenty

CobKits said:

lower W/SF > higher GPW

50W/SF of cobs is a shitload of light expect to be on the higher end of g/SF but on the lower end of g/W

i agree that 1200 is plenty

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i think the plan for right now is to give each set of 4 cobs a hlg185(8 per 4x, which will put me at around 1600w but i will have the option to dim them down. i could do a side by side with one at 1200 and one at 1600. For now i will be doing SOG but i will soon be transitioning back to 12 per table and trellised. its about the same cost to do 2 hlg 600s as it is to do 8 of the 185s and id rather have the backup wattage just in case. i think g/sf is more important than gpw in any case. at 1600w of cob there is still a very nice savings in wattage compared to hps and a substantial savings in heat production/cooling cost(which is my main concern)

DesertHydro said:

i think the plan for right now is to give each set of 4 cobs a hlg185(8 per 4x, which will put me at around 1600w but i will have the option to dim them down. i could do a side by side with one at 1200 and one at 1600. For now i will be doing SOG but i will soon be transitioning back to 12 per table and trellised. its about the same cost to do 2 hlg 600s as it is to do 8 of the 185s and id rather have the backup wattage just in case. i think g/sf is more important than gpw in any case. at 1600w of cob there is still a very nice savings in wattage compared to hps and a substantial savings in heat production/cooling cost(which is my main concern)

Click to expand...

What did you go with?

i am definitely going with the 185s @700ma that way i can push the juice a little harder and see how it pans out. i can always dim them down to save heat and wattage if the returns in GPW dont justify it. i will be ordering all my gear in the next 2-3 weeks. i may have to start under hps for the few weeks and then transition over. my garden cycle timing was on point this round but the funds are not available to build the arrays just yet lol.

the clones and mothers are primed and waiting for the flip. i have to finish panda filming the walls and my pond liner for the floor comes in tomorrow. just have to build a 2x4 frame for the liner, hang the panda, lights etc and then i will flip the clones and the mothers. moms are getting scrogged and the clones are no veg SOG on my 3x7 home made ebb and flow table.

these moms are looking lush as hell under only 300w in a 4x4 lol. that array was built for a 2x4 but its still killing it in double the space