How much light during seedling stage?

I have LED grow lights (600W Viparspectra dimmable) and on the instructions it says to do 12/12 during the seedling stage and switch to 18/6 during vegetative, however I heard that you’re supposed to do 18/6 during the seedling stage. Should I do 18/6 or should I follow the instructions and do 12/12? Also how do I know when it is officially the vegetative stage.

Thanks!

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I’d go with 24/0 lights on at the start till the seedlings get a bit of size. After a couple weeks drop back to 18/6.
You only do 12/12 when you are ready to flip to flower.
:v::call_me_hand:

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@The_Tank_2000 like The @Oldguy said i use 24/0 for about 10 days then go to 18/6

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Thanks guys! So just to be clear, even though the instructions on my grow lights say to give it 12/12 during seedling stage, I should give it 18/6 anyway right?

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Yes i use a T5 HO florescent for my seedlings at about 6 inches above them.

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