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That setup is Legit bro :clap: Another setup is 5 x HLG320 @1050ma + 20 x vero29C 70v COBs = 1500W over 4x10 area :leaf: Growmau5 got 4.6pounds from 1500W as seen in video:leaf:

Will you be adding CO2:confused: If not then 1300W is 32.5W/ft2 in a 4x10 space & most people are going with 30-40W/ft2 so u should be good :clap:

Veg = 10 par watts/ft2 Flower= 20 par watt/ft2 CO2 = 30 par watts/ft2 :leaf::leaf::leaf::leaf::leaf::leaf::eyesmoke:

3ft is good height for now & just tell granny not to overwater cuz plants hate wet feet. How old is plant:confused: if over 1 month then throw it out & plant new seeds cuz in 1 month with 18hrs/day should be 1 foot tall plants.

More voltage & thats correct if 1 driver fails then you will still have light unless u got spare HPS then go with 600w driver.

315w CMH:confused: How far above the plant is light:confused: Dont give up :weed:

Dont overwater & no nutes for the 1st week. Throw ur blurple light in the garbage & keep temps around 80-85F good luck :leaf::leaf::leaf::leaf::leaf::eyesmoke:

go with the A version drivers cuz they have built-in dimming on driver with adjustable screw. Also ask questions about QBs & drivers here >>>> https://www.rollitup.org/t/diy-with-quantum-boards.927159/page-425#post-14019551 Most of questions have been answered in above thread:weed:

ask @Stephenj37826 or @robincnn if u can preorder the QB132 because they sell like hotcakes but they try restock asap, good luck bro:leaf::leaf::leaf::leaf::leaf::leaf::leaf::eyesmoke:

yes, the 288 can run upto 60w NO heatsink

yea 288 need heatsinks & use same driver as i already mentioned

thats correct, NO heatsink needed if running boards @ 75w Link = 500w COBs 4x4 2.15 pounds :leaf: https://www.rollitup.org/t/500w-diy-led-4x4-organic-2-15-lb-grow.952567/

600w $600CAD DIY 8x QB132 = https://horticulturelightinggroup.com/collections/diy/products/qb132-quantum-board 2x hlg300w = https://ca.mouser.com/ProductDetail/Mean-Well/HLG-320H-C2100B/?qs=%2Fha2pyFaduiLS2rM4huBhHRQ6YUB3VfV1iAlbduqDxeVwkVAnRxkuSQU7vaE%252bBt8

yea ur on the right track, 1st option = passive 2nd option= Fans

550W overkill for 3x3 but perfect for 4x4 LINK= 15000W HPS v 9000W LED

BCBLONDES = https://www.bcblondes.com/Default.asp HLGCANADA = https://hlgcanada.com/ how big is ur grow space:confused:

Thx Random & Rahz, Do you have a link were to buy HLG600H-C1400? google says they dont exit.

hi Rahz & @Randomblame , can a hlg 480h 1400 constantly run 420 volts of COBs? Link says Max open circuit voltage is 420v but im not sure wat that means & thx. http://www.meanwell.com/webapp/product/search.aspx?prod=HLG-480H-C

:leaf:PLC6 = http://www.pacificlightconcepts.com/product/plc-6/ :leaf:HLG550= https://horticulturelightinggroup.com/