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Bonjour If you have 4000ºk cob it is a good idea to add 660nm 730nm at light off is good too...it is proven fact...so yes sometimes it is cool to use diodes! And there's some as efficient as cob some more...depend on how your cob are efficient! But I guess if you go with 3500ºk you don't need...

Bonjour Meanwell driver have a 7 years guarantee!!! And the difference of efficiency so the difference in electricity bill pay the price difference in 2 or 3 years! I would say that 90% of the cob users have Meanwell drivers... You build something for years...maybe 10years even more...so don't...

Bonjour 80cri is ok for 4000ºk! But for a 3x3 I would go with an hlg-120-700 ...150w is what you need! I will do the same for my 3.5x3.5x4.5 vegg tent with 9 cxa2530 (but from kb or cutter they have better bin!) On an hlg-185-700b or 11 on a 500b! A 3x3 is 9sq/ft...9x20=180...so you need mini...

Bonjour You can't run 5 cxb 3070 on an hlg-240-2100! Best imo is 4 cxb3590 on an hlg-185-1400b! Or 4 on an hlg-240-1750b! CU

Bonjour You said you want 6 cxb3590 @1050mA for 60% efficiency...an hlg-240-1050b will be fine for this...... CU

Bonjour Can you remind me the size of your growspace please! CU

Bonjour Are going to put 3 diodes on the same "hs"? I thought we were looking for the better spread possible!!? I guess it is more effective to use mono alone to get the best coverage possible... Or maybe I miss something...but I believe coverage is more important than intensity with 730nm...but...

Bonjour How much did you pay for it? I am about to buy some...the same thing but in 1000mA (maybe 700mA is enough but I want to be sure...!?!) It is for a 4*4! I was thinking 6 @1000mA would be enough!? Have a good build! CU

Bonjour Is it possible to see a few pic of your scrog?...to compare! Thanks CU

Bonjour You should go watch Growmau5 and greengene garden vids on youtube...lots of good infos and a mounting vid too...so go watch it and then you will have less questions or maybe none...they are good teacher...better than me! CU

Hi Brett mon ami...how are you!?? I agree with you...many info and possible setup to build! Take your time because if you build it well and run it cool it could last 10years or more...! If you never experienced hps you do not have to...lol...it is like an old sport car (hps) and a Bugatti...

Bonjour You will need an hlg-240-1050 to do that! As for hs size and spread...just use 1hs per cob and make something with aluminium L shape to carry all the hs to be able to have 1 cob per sq/ft but less hs to buy...a few inch less but! CU

Bonjour It will be an awesome setup! I can see you have good results with hps!...don't feed like for hps...! I vegg without any liquid nutes...only bagsoil/coco/ewc and a few watering with molasses...no more...and it is green very green...I just add some organic grow 2/3 before and during...

Bonjour If you didn't need it quick why did you buy from one of the most expensive? How much did you pay for cxb3590 3500ºk 36V CD? CU

Bonjour Kingbrite on alibaba is a reliable seller too...and if you need three driver or more they are really competitive! CU

Hi mon ami! How are you? And your grow...is everything going well with your Vero? I hope everything is ok for you! Have a great day ★

Bonjour Is it CB bin...all the cob? Why not CD for 3500ºk and DB for 5000ºk? CU

Bonjour Why do you want to run cxa and not cxb? And why xml? For a 4x3 you will need mini 12x30w = 360 or 12x50w maxi 600w The best setup would be 1 cob sq/ft! But 2 x 200w panel of cxb3590 3500ºk36V CD would be awesome! (For vegg and bloom!) CU

Bonjour It is a very good deal for 14$! V29 will be good if you can source it locally or try kingbrite on alibaba with their regular shipping (and he can write a low price on the package so even if you pay 90% of 20 $ it will be ok CU

Bonjour Yes I know how to tin...is it the good word? I also solder but with a stick and a mask...this is soldering I guessed everybody understand that I am lazy...lol! Is it ok if I buy my diode on a star or do I have to do it too...please let me know! CU