420 fast bud

Stressed from growing at 24/0. 18/6 is best. All plants, canabis included NEED sleep to be able to complete their photosynthesis cycle and have a correctly functioning metabolism. A plant with an incorrectly functioning metabolism will neve grow to its full potential. Also, they seem to be suffering nitrogen toxicity. Autos at that age can get by just fine on quarter to half strength nutrients.

It's really hard to tell with the lighting in the photos... is it possible for you to take a pic without the lights on - maybe just your camera's flash - so we can get a look at the true color of the plant? Since they are so young, you've not started nutes (which is a good thing as autos don't like nutes before they're 2-3 weeks old)... so I'm kind of in the dark here not being able to see the colors or see what you're seeing... sorry!