He was saying his 750de was covering 4x8 and his de HPS uses less nutes than led. I recently setup an all cmh 630 room, lights are on approximately 4’ centers. Under 1k
gavita I start about 900 and taper down to 600(1.2ec) as flower progresses. With the cmh I started out at the usual 900ppm in fresh coco. Initially my runoff was coming out at 700 or so so I kept it up. Got busy didn’t check runoff for awhile.... By the 3rd week runoff was coming out at 1500 so I’ve been pissing them hard with 5-700,got it back down under 1k. But now at 5 weeks it seems like they only want 500 or less showing slight toxicities. Mostly N tox actually. Been reading lots trying to figure it out and found guys saying cmh does use less nutes, running 500ppm or less. And now you confirm it as well, just got me thinking. Is the ph coming out any different under the different lights
@heisenbubble ? That would indicate different mineral uptake