Critical and Northen - Auto

Hi guys this is my second experience with the automatics I created this diary to increase my knowledge especially thanks to your help in the comments. my question is second flight is Critical getting too long? and why does it happen I have a Mars Hydro ts1000 that I keep at 50% and at a distance of 30 cm but despite this the plant seems to stretch and not grow at its best what do you advise me to do?