I’m using the magic grow spectrum X 880 watt led. How far should my light be from my sprouts and at what brightness. Growing auto’s
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I would recommend setting the intensity using a meter or the smart phone app called PHOTONE. With either you’ll set the PPFD around 250-300 or a DLI of 18-22 
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Thank you
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Can’t find the app and have no meter😔 I do think the light tells you the ppf output on the lcd screen though maybe I’ll try using that just not sure how accurate it is though.
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It only goes down to 660 something ppf’s I think I have about the right hanging height for that.
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I usually sprout seeds under a T5 fluorescent fixture but have 25 or so under a Kind X420 at 18” and cranked down as low as possible and reading 300 PPFD
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I have a 200 watt light on my seedlings right now set at 35-40% on the dimmer at 30 inches above the seedlings. They are doing great. Hopefully that helps you
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I forgot to say i started at 25% intensity for the first few days. They are a week old now
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My lights 880 watts and only turns down to 32% ppfd something like 668 I have it about 30 or so inches above my sprouts I think this is fine. I hope. I guess the plants will tell me if otherwise?
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I’ve asked medic grow on their site. And they keep saying for seedlings they recommend 6 inches above? But these are sprouts and I feel like that will kill them.
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I keep posting this because when it found it it shocked me, $31.50 takes the guesswork out of it. (bold italic are links)
Up to$35 since yesterday, 
If your ppfd is really over 600 and you cant dim your light anymore i would highly recommend raising your light. Like alot
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Found the app my light was too dim thank you sou much.
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I set it to 42% it was reading 300 PPFD on the photone app and DLI of 19.1, I have the light about 30 inches above my sprouts. Hopefully they start growing bigger now.
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If you have an IPhone you’ll need a paper diffuser Growmie, congrats on the app
That’s still like half the price I imagined they’d be. Not bad at all
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Nice light.
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Used to have to work that out with my main light. Added a HLG 65 for seedling at 12" and it improved the seedling control of node spacing substantially with no issues. “Right tool for the right job”
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I have an android
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I just hope I didn’t stress them to much with the ppfd being so low like that. They’re already a week or 2 behind because as a noob I made a lot of mistakes. But that’s why we’re here right? To learn so we can do it better next time.
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