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Hi. Can somebody say what optimal distance above canopy should be in veg and bloom? I'm running 4 cxa3070 AB 3000k and 1 cxa3070 AD 5000k powered ea by 1.75 amps. So total watts is 336. I run it for 100% power without lens. SupraSPL this lens fit to cxa3070 ? And how to calculate PPFD, umols...

Hello Supra. Respect from Belarus. I have a question for you. After reading posts from this forum I buy cree cxa COB's to make my diy lamp. Now I'm running 4 cxa3070 AB 3000k and 1 cxa3070 AD 5000k each run by 1.75 amp. So total watts 336. Could you please calculate me how much PPFD I get from...

I know where is cheaper! I contact with this store on alibaba http://coolceen.en.alibaba.com/. The price that manager Lynn Liu give me was For HLG-185H-C1400 USD57.5/pc FOB and HLG-80H-42 will be USD36.5/pc FOB. It cost cheaper but prices are FOB. It's mean that you should deliver by your self...

Oh shit. My fail guys. You right. So meanwell hlg-185h-c1400 will be the best choose to run 4 cxa3070 in these days or not? But what driver can run this cob's harder? As Supra say "you would get more bud by driving each COB harder" I don't want drive it very hard. But I'm think 2amps will be...

How about this driver? Does it good to run 4 cxa3070 ab bin 3000k? And how many par/ppfd I can pull from this? http://www.sunpower-uk.com/product/300W-150V-2A-Constant-Voltage-LED-Light-Driver/PLEV-300S150ST/default.htm