they shouldn't be so yellow, kinda looks like they are under fed and need some more Nitrogen. i am still a noob grower my self, so you might want to wait for someone else to chime in but if i had to guess they are asking for some food.
Leaf tips are saying over fed, leaf texture is telling you PH is off. Keep your PH clean and unlock your plants. It looks like you fed heavy, then PH changed at a later feeding and locked your girls out.
Nope, those are large. With Auto's, you are on a time table set by plant. Any distress in first 3 weeks will greatly reduced yield. Your burnt tips slowed down growth, then lockout caused further yield decrease. But all is not lost. They can come around and still produce. PH is a real killer in autos. 3 week veg is hard to recover if you lockout your plant. One week of stunted growth is all it takes to keep leaf mass down. After 3 weeks no new fan leaves, more leaves, larger plant.
If your 1000 watt bulb is at 1 meter, anything growing greater then 1/3 meter would be at risk.
Not sure how you grew that monster with 1000 watts so close. Even in a cooltube that's a lot of energy to be less then a few feet away. Check your PH pen too, I cal mine every time I use it. They will drift over time.