Led light, seedlings

Morning, i recently brought a small led for my seedling tent ’ replacing my t5’ they germinated very quickly, sprouted and now seem to have come to an almost stand still whilst still maintaining a nice green colour. My question is how much light should they be getting and does height really cause issues on a unit that you can run a light on 15% or 100%.

@imSICKkid do you have much knowledge on this man? i use cmh so this is my first led.

@kedavra I start my seedling with 50% with led fullspectrum but you can use 100% I do with another seedling cuz I have another plant on my tent with 3weeks old so if you want used 100% or 50% not lest

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@kedavra and if I was you I center all the plant to the light cuz I see space on the center of the light

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i know i have done something wrong, i mean they are healthy just long, tall and not what im use to looking at.

i moved them around just cleaning some things in the tent. They are center again now. only 3 have seedlings the others are just in their still as i can be lazy.

@kedavra yes they look healty

Happy growing bro

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cheers man, thank you very much.


The question of right height/brightness comes up all the time. There is a very simple solution these days. A free or inexpensive app for your phone. They have been shown to give accurate readings. I have an iPhone and use an app called Photone.

Use the PPFD reading from the app. For seedlings you want 200-300 PPFD, once they veg you are looking for between 400-700 PPFD and in flower, 600-800 is ideal.


Man, cheers heaps for this. Im going too look at the apps right now

In other words 24",18"12" light distance lmao

They look like they’re stretching to much so I would lower it a few inches


Cheers heaps man, cant lower that one as it is strapped to the roof. Ill work something out and bring the pots up. I use to just have my t5 sitting on them basically but wasnt sure with the LED