Lower Leaves

Now 2 weeks into flowering. Lower leaves have begun to turn yellow and dry out. Also after 12 hour light cycle plants are wilted but rebound daily during the dark cycle. Any Advice would be helpful thx.

Sounds like fairly normal behavior for MJ plants. As long as the yellowing isn't coming on like wildfire.....and your lights are not TOO close....carry on. The wilting is likely a moisture stress. Too much/little water. Not a severe condition. During the dark cycle the're reaching up for light, and during the day they dont have to and there droopy water-logged, OR the opposite, droopy thirsty.