Sexing seedlings in the same room as my clones????

Hey guys.. I have a 400w grow going, 3 NL clones and three seeds from my outdoor crop. I want to turn the lights onto 12/12 to find the male seedlings, once this is done i want to carry on vegging until the end of this month. I want to do this so I don't waste time growing the seedlings big only to find out they are male, as I have access to some small church clones that I would like to put in place of them. What I want to know is will it have any effect on the females, because I already had to reveg the NL clones and don't want to have to again??

Hey bro, only once I had to reveg some clones after they had been in 12/12 for a few days and they grew up fine so there should be no problems...

This is what I would do: If you can and have the time/dedication to stick to it, take those 3 seedlings out and put them in a perfectly light sealed box/closet for 12 hrs of darkness and then put them back into the grow room for just 12 hrs of light... Just keep this up for a few days so you can sex them and then put them back to fulltime veg. That way you wont affect your NL clones by causing them stress from revegging. Just gotta remember to set your alarm clock for those couple of days Or even put the seedlings in outdoor light for a few days (but you might wanna have a mini greenhouse or keep them on a windowsill to keep them warm as moving them outside in the cold would also cause shock)

Another thing with seedlings my mate had a bunch (like 20) of seedlings growing under 2 250watters to sex them and get the best genetics to choose the best as his mother plants... Kept them on an 18/6 light cycle the entire time and a couple weeks in they just started showing very small preflowers anyway without having to 12/12 to sex them, but the preflowers were very hard to spot gotta go microscopic on them haha. This way would be stress free but not guranteed to determine the sex either lol.

Goodluck with the grow bro