She's not flowering yet. You'll know when you see a lot of fingers developing all at the same time in the very center of the plant. Then white pistils will start popping out of the top like mad.
While you want it to be as dark as possible, I dont think 10 lux is going to stop flowering. Some strains may be pickier though. If you arent seeing pistils in another week, then I would worry a bit and try to minimize the darkness. You should start getting your stretch any day now if it hasn't already begun.
Good luck mate!
Hi Mismey i can barely see some pistils in the 2nd photo, so your girl is definitively in pre-flowering stage.
Also, 25 lux are too many and there is a risk of both delaying flowering and increasing the chances of revegetation and hermaphroditism(i.e. the luminance of the full moon is 0.27 lux).
U can continue to hold a lighting but the bulb must be green tone. Hope this helps U.👊