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i have had a weird time with this girl. At first at switch her leaves at bottom turned yellow prem and now leaves at bud have brown spots!!! It’s a small cupboard grow running clu-048 3000k (flower) with extra 660nm red (1000 lumin extra) temps lights on 26C off 20C soil at 6.2ph , tap water...

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Tap water as no nutes needed as of yet . I got some magnesium in diluted to recommend and defffo helped leaf curl but I will have to lime to see calcium response see if I can get shut of yellow/rusty looking parts expanding on newer leaves. Please advise

Can the deficiencies of calcium or magnesium go further on the leaf as in the loosely looking like rust spots nearer the end of the leaf could dry out and (@ the point of conditions) fall off? As I am experiencing serious leaf damage early. Comp/perlite ph6.6 struggle humidity at 35-45% 3 weeks...

Nope I'm wanting to do my wiring in series but really fighting with elg-100-1050b and 1400b. External dimming I think will be easier to control . It's a straight forward 2 cob light clu048-1212 to wire in series and the best driver to do so?

Thanks Moflo, that's a great grid of reference and makes it easier to clarify figures instead of notes written on envelopes and cross reference pages by screen. But I'm now thinking the 100-1050b is best with a 100k pot to dim. I hope for a little more advice on this as efficiency if any more...

hi I'm 'hopefully' ordering my drivers today but I want to make sure I'm making right choice, I want to drive 2 x CLU048-1212C4-403M2K1 @ UK 230 volts and my choice was going to be the Mean Well ELG-100-C1400a (possible C1050a) wired in series. Please can some one give me some expert advice as...

I'm running 230v and I'm not sure on running so was looking at elg-75-c1050a for 2 clu048-1212 but thought upping wattage but then I'd increase current too! Argh! I don't know. I will look for led thread! Thanks BHMC I will post there,

Need Advice on choice of led driver , building a 2 lamp cob array Citizen CLU048-1212 in series but will running a mean well ELG-100-C1400A will it be better than the ELG-150-C1400A ? I am ok with math but not great. Also Please tell me if I am posting in wrong place!! Thanks in advance TJ