Hurrl
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Previously I've had no idea what lux my plants were under and I had been using some cheap COB fixtures off Amazon. A CrxSunny 1500w COB fixture and 2x Roleadro 400w COB fixtures. I've always just adjusted light height based off canopy temps. Which was getting hard to do due to height restrictions. The COBs seemed to get the job done okay enough but were putting out a lot of heat. Recently I was able to pick up a couple HLG 320w QB-324 XL fixtures. I replaced the hot COBs with these two fixtures. I've had the quantum boards cranked up to max because I replaced 2300 supposed watts of COBs with 640w of quantum board. Since running the HLG quantum boards I've had a constant issue with what looks to be calcium deficiency.
Today I pick up the Dr.meter LX1330B Lux meter. Holy shiz... At 24" above the canopy I'm reading about 81k LUX! Turning both fixture's potentiometer down to the halfway notch I'm getting about 44k LUX under each fixture at the same 24" height. The CrxSunny 1500w COB fixture at about 12" was reading around 35k... These quantum boards were putting off quite a bit of heat while maxed out. So I've just been pumping in cool air to compensate. I'm wondering if this intense light and heat, (ambient temp measuring about 80f but canopy leaves looked to be reading about 75f), I have been giving my autos throughout Veg has been the real culprit behind what looks like Calcium deficiency? One of my girls is starting to flower now and shows Cal Def all over it's bigger fan leaves while my other girl who is roughly a week behind and just going into pre-flower looks a lot better off but still has a couple fan leaves with slight signs of Cal Def. Just for reference I'm in an Undercurrent Hydro setup running the new formula of Megacrop with RO water that gets about 150ppm of CalMag before adding nutes. My girls are Dinafem Moby Dick XXL autos. And I also recently started running beneficials in the res to combat any potential root issues. I swapped over from trying to run a sterile setup since sterile has never worked for me. I've had great success in the past with GH nutes and real growers recharge as well as Megacrops original formula with beneficials. So running beneficials in my system is not new to me and I know it works. I've just been running this new formula of Megacrop and have been really worried that its garbage and causing me plenty of headaches. But after seeing these Lux readings I'm really curious to know if it could be from too much light and some excessive heat? I don't have any pictures or I would post them.
Today I pick up the Dr.meter LX1330B Lux meter. Holy shiz... At 24" above the canopy I'm reading about 81k LUX! Turning both fixture's potentiometer down to the halfway notch I'm getting about 44k LUX under each fixture at the same 24" height. The CrxSunny 1500w COB fixture at about 12" was reading around 35k... These quantum boards were putting off quite a bit of heat while maxed out. So I've just been pumping in cool air to compensate. I'm wondering if this intense light and heat, (ambient temp measuring about 80f but canopy leaves looked to be reading about 75f), I have been giving my autos throughout Veg has been the real culprit behind what looks like Calcium deficiency? One of my girls is starting to flower now and shows Cal Def all over it's bigger fan leaves while my other girl who is roughly a week behind and just going into pre-flower looks a lot better off but still has a couple fan leaves with slight signs of Cal Def. Just for reference I'm in an Undercurrent Hydro setup running the new formula of Megacrop with RO water that gets about 150ppm of CalMag before adding nutes. My girls are Dinafem Moby Dick XXL autos. And I also recently started running beneficials in the res to combat any potential root issues. I swapped over from trying to run a sterile setup since sterile has never worked for me. I've had great success in the past with GH nutes and real growers recharge as well as Megacrops original formula with beneficials. So running beneficials in my system is not new to me and I know it works. I've just been running this new formula of Megacrop and have been really worried that its garbage and causing me plenty of headaches. But after seeing these Lux readings I'm really curious to know if it could be from too much light and some excessive heat? I don't have any pictures or I would post them.