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Thanks for the reply. Fingertip depth and the media is moist. I watered until runoff one of them yesterday so will see what happens over next few days. I will check out the site and start reading up on water and nuts for coco. Why are some doing better than others? Should they not all have the...

Thanks. I read to wait until Day 21 before nutrients, and is it true both stem and leaf must curl down in underwatering ? The same media is producing plants like these with no issues, so wondering why I have issues with the ones above. Although there is some brown on the edges..? Trying to...

Hi everyone. Been reading lots, and learning. I’m at day 18 for autos, and day 11 for photos. Some are going well but some not so. Hope you can help. I have not used nutrients yet. What I would like to know in first week how much water should be given / soaking the media until runoff before...

Thanks for the reply, first post i clarified questions better, the last post should not have said "EOD" should have said Emmerson = FR to R should be less than 1:3 (closer to 1:1 research shows may be better) so yes got that far red 730nm is used alone to trigger the Pr Pfr states for "sleep...

after some more reading.. Emerson effect - someone's comments (no references) – don’t use during first few weeks of flowering otherwise you get elongated stems. 660 nm does enhance photosynthesis when used alone, just not as efficiently as having it combine with 730 nm. 12-14% of the total...

So questions im still trying to figure out. when 660+730 should be used in the cycle yet for Emmerson effect ? See post below, apparently 3rd week of flowering ? what part of the cycle to start the 730 15mins after lights out for EOD effect ? UVA 385nm at same height as other lights and at...

Do you think the seol 285nm UVA is enough that the geekbeast pro 630watt has per 4x4 ? In a 9x5 for example or 8x4 you could run 3x UVB (one each end of the geekbeast and one in the middle of the two lights) Solacure UVB - Geekbeast pro - Solacure UVB - Geekbeast pro - Solacure UVB Use the...

Thanks for the replies. This is a quote from https://www.agricultra.com/uvr8-chemical-profile-shaping-in-cannabis "385nm UVA light makes the UVR8 photon receptor more susceptible to the effects of 285 nm UVB which means less energy is required to effectively trigger the UVR8 pathway. The...

This was the study talking about R:FR ratio https://www.karger.com/Article/Fulltext/489030 The R:FR ratio is referring to 660:730 not the total red spectrum The R:FR photon ratios can be calculated according to the definition by Sellaro et al.(2010); R:FR = (650–670 nm)/(720–740 nm). B:G =...

Here are the led 730nm only and UV only bars Kingbrite 730nm comes in; 20watt 11 led Cree XP-E2 560mm length strip 35watt 20 led Cree CP-E2 890mm length strip 35watt 52 led Epistar 940mm length strip Rapidled 730nm comes in; 7watt 4 led chips (covers 3x3 area) Invisible sun 730nm comes in...

The time spent to understand all this and how to recreate it has taken so much time im wanting to ask for help and to consolidate what I have learnt so far and make it easy for others. I have highlighted in red the areas i need help with esp using UVB Ideally i want to add End of day effect...

Yes good point, i could go 301H and know im getting the highest bin 301H, but PPFD and efficiency of the driver / led ratio with correct spectrums is more important atm

Ah yes i was mistaken, wow what a huge difference in leds !!! Makes it 0.234 watts per chip which is great ! So no one has confirmed my theory that the less chips are used and the less the driver is loaded, the same 600 watts is spread through the number of leds and less efficient they become...

Thanks for the reply. The Meijiu A8/F8 650W is runs 1920 LM301B chips which means each is running at 0.31 watt (the higher the watt the less efficient). As above Umol KLZ-650W 8 bar - 80watt per bar with 300pcs (total 8 bar 2400pcs) LM301B = 0.25 watt per chip Meanwell HLG-600 Kingbright...

nothing really, just the 301H is the best performing 301B "the top of the class"... All specs are the same. i think its only 2% better

Thanks for the reply. umol have a 650w 8 bar and 1000w 8 bar light - im quoting the 650w 8 bar specs, here is the link :) https://www.alibaba.com/product-detail/foldable-650w-full-spectrum-led-grow_1600111028376.html So ultimately is this correct. 600W / 0.2w (samsungs rating on how many watts...

A LM301B chip that samsung says uses 0.2watt then 600watt driver can really run 2880 pcs (based on 96% efficiency using meanwell spec for HLG-600) So if you only use 1920 pcs like meijiu, then is each chip getting 0.31 watt or 0.45watt for the kingbrite and using 600watt while at 100% ? If...

I have spent hours and hours researching and reading, learning so much from people on this forum. One thing i dont understand is how two manufactures can use the same chip, driver and have similar PPFD (at least in the center) yet one has almost twice the amount of leds Umol KLZ-650W 8 bar -...