Sweet, you’ll have all the tools now. It’ll become 2nd nature after using your PH and TDS pen with mixing nutrients and how often to check your run off. Personally I like to check my numbers once weekly, if they look healthy and you’ve tested your nutrient solution it’s a visual health check.
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I would water in enough to wet the pot but not to run off. PH around 6.5-6.8 for the next 3 weeks. When your TDS pen gets here we can check the run off starting a new week.
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Yes 24in at least from top of canopy this early n dim light down they don’t need that much light in veg
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At veg the lowest setting
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That’s the HLG 300 right? Lowest setting is 90 watts on this light. At 24-30” I would say around 300 watts. If you have an I phone download the free Photon app, it’s very accurate and will give you DLI and PPFD numbers. Different stages of growth require different amounts and intensity of lighting.
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Went to get you some readings for your light ht and intensity and it’s lights out in the closet. I run a 6/2 so they should be back on soon 
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No it’s the spider farmer SF4000
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So I should put my lights at the lowest setting and not the highest?
Dimmable?
They are
I got them at about a 80 on the light setting
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80 as in 8 clicks on the dial? Impossible for me to tell you without that light experience. I would assume if you 80% of the 4000, that’s way too much at 24”-30”. Really need that app
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Yeah it’s on 80% lol I need too Know what too set it too does that app show me what I need too set the lights too?
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No there’s a number of factors involved but the simple answer is each growth stage has its own range of PPFD and DLI. The photon app is a light meter that run place at the top of your canopy. It’s a DLI function that will
Read that, you either raise your light or dim it. Vegging DLI high range would be somewhere in the neighborhood of 35. As mentioned @dbrn32 is the community lighting expert.
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@dbrn32 wassup man, what would be the best setting too put my
Light on I have a spider farmer sf4000
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Can I start tying down the branches?
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Yes, are you growing the main vertical and tieing the sides off?
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