Signs of flower while in 18/6?

I wanted to veg these guys out for a couple more weeks but are these signs of flowering already? I've had them on 18/6 for about 6 weeks now.

Not sure if related but, they have recently gone from outdoor in a greenhouse (with extra lighting for correct photoperiod) to indoor.

I thought you can continually veg until you decide to flower, so I'm just confused.

I appreciate any help possible, thank you!

simply means they are mature and ready to flower

yeah i second that.those are what are reffered to as Pre flowers. it means the plant is mature enough to flower (without stress) and you should notice the nodes begining to alternate.instead of growing 2 new branches at time will be one on left.grow.one on right grow.instead of 2 grow.2grow.but u can keep vegging them if u want n youll be fine.