raise light and power to get hight temps and better venting

pvmhobostarted grow question 9mo ago

so whats would be best option for me i have my light on 240w (25%) around 3 ft from plants my tent doesn't get over 74 and its not venting as much as id like my ppfd is around the 300 mark should i raise light and turn to 400w (50%)

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Setup. Lighting

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All_our_small_plantsanswered grow question 9mo ago

Hi also hier ein paar anhalts Punkte denn bei Cannabis variiert der optimale PPFD je nach Wachstumsphase: Keimung: 100–300 µmol/m²/s Vegetative Phase: 400–600 µmol/m²/s Blütephase: 600–900 µmol/m²/s Aber wichtiger ist der DLI Wert den der DLI gibt die Gesamtmenge an photosynthetisch aktivem Licht an, die eine Pflanze innerhalb von 24 Stunden erhält, und wird in mol/m²/Tag gemessen. Es kombiniert die Lichtintensität (PPFD) mit der Beleuchtungsdauer. Für Cannabis liegt der ideale DLI-Wert zwischen 20 bei Keimlinge und in den ersten Wochen und 40-45 mol/m²/Tag in der Blüte. Dazwischen kannst du langsam steigen. Wenn du zumbe die app Photone nutzt kannst du dort einmal die PPFD messen und den DLI Wert. Bei diesem must du dann die Stunden angeben in denen deine Lampe an ist und welches lichtspektrum diese hat. So kannst du deine Lampe ideal positionieren. Je weiter weg sie von der Pflanzen ist desdo mehr Fläche wird sie abdecken aber halt mehr intensität benötigen.

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Ninjabudsanswered grow question 9mo ago

I’d probably move the light up it probably will help them strech out some

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Ultravioletanswered grow question 9mo ago

Higher light with stronger intensity will give you a better spread across the space. At 2-3ft you will have a strong central pffd and weaker sides. If electrical concerns are priority then keep it low and dim. If a more evenly distributed ppfd is your goal for growing 7 plants then raise it as high as it goes and blast it. This will give you a far more even 300ppfd across the canopy. Although your light looks like it fits tent very well. More output = more heat too. Ambient temp should be measured from canopy and you don't want to go over 77f anyway unless your supplementing co2 or transpiration is running hard. You won't get much venting until the plants get bigger, once they start moving more water. You can vent 24/7 if you switch fan on or have it set to unattatainable , got to understand what it is your venting for and why first.

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TruTraTrianswered grow question 9mo ago

You can roughly balance watt and height – higher watt at more distance can give similar PPFD to lower watt closer in. Example: 50% power at 24" might equal 25% at 12", depending on the light’s optics. And: by adjusting both, you also influence tent temperature – higher power = more heat, more distance = cooler canopy. Easiest way is to measure PPFD, but experimenting and observing is a great way to learn too. Everyone throws photone app around.. probably got to test it too 😆

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Ninjabudsanswered grow question 9mo ago

If your trying to raise the temps yeah I’m sure upping the light intensity will definitely increase the temperature Also I suggest if you want better circulation in the tent to get a fan that attaches to a tent pole and a fan that gos back and fourth helps all the air in the tent get moved around

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