I’m a first time grower and started my seedlings on 18/6 light cycle and was wondering if I can use this same light cycle all the way up until flowering and then switch to 12/12. Do I need to change this light cycle for veg or will it veg normally?
@TonyT yes you can but if this is a photo then you can run 24/0 until you are ready to flip to flower and then go to 12/12.
If it was me @TonyT I would stay on 18/6 all the way to flower give them babies some rest time
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I’m a 20/4 veg guy myself 
Okay thanks also was wondering if you need a dark period when you switch light cycles or can you just switch them no problem
I just switch when ever im ready it doesn’t matter don’t bother them at all