Shifting the light schedule during pre-flowering EXPERIENCED please

EDIT- I just realised i got another timer lying about so im gonna use that to keep the fan on longer by itself. Sometimes i get so set into one way of doing something it makes other things more complicated lol

Hi i know this sounds like exactly what your told not to do, but i think im gonna need to do it.

I just need some people to share their experience of shifting the light schedule during preflowering/ early flowering, and the best ways to do it without stressing the plants to the point of going hermie

Basically i have a stealth grow, my filter turns off when my lights turn off so that its not noisy during the night (the wind is what makes most the noise, not the fan) and my lights and filter are currently set to turn off during mid evening. Now that they have started preflowers, I notice that the smell is slowly creeping out the growroom and by an hour later my room smells of weed, and things are only gonna get smellier from here on in.

I want to shift my light schedule by 2 hours in total, and im thinking of doing it by half hour each day, for 4 days. Or i could do it by 15 minutes each day for 8 days.

Has anyone done this before and it has worked well with no stress?? Thanks for any help

I wouldn't see why this wouldn't work. Doing it like that is your best bet if you must.
Never have any hands on experience doing it that way but it's not a bad attempt at all.

wow. I can be really stupid sometimes lol I have another timer lying around somewhere

Nice Ol Bud said:

I wouldn't see why this wouldn't work. Doing it like that is your best bet if you must.
Never have any hands on experience doing it that way but it's not a bad attempt at all.

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thanks man, I just realised i wont need to do it this way at all, although i don't see why it wouldn't work for someone with no choice

I moved mine in 15 minute increments every other day and had no problems.

You could also get a fan speed controlled and turn it way down during lights off, just enough to keep negative pressure in the tent/room, and then no smell will escape and it will be really quiet running on low. Not sure how you'd automate it though. I know they have day/night controllers but I don't know if they would run a fan like I suggested.

thats an interesting idea, i've heard of fan controllers before but im realising now how useful they could be. So they can turn right down just to keep a negative pressure....hmmmmm thats an idea indeeeeeed. I don't beleive my fans i've got now have the ability to run on a speed controller (they were the cheapest of the S+P TD silent series, but the next ones up i think were controllable). When i upgrade my growroom or move house ill deff be gettin some tho, thanks