Rookie420

@Njanne, if your lights don't have a dimmer option I recommend getting a plug that you can manage the Watt output from. You can get a duel pack dirt cheap and they work great that will dim your lights so they aren't too intense

The issue with the leaves are one of 2 things, 1. Light too close 2. Not enough calmag in your mix as using coco u need that bit extra as tho coco loves to absorb calmag Boost your humidity too to the 50-60 mark, the damaged leaves won't go back to a healthy colour it's the new growth you want to be looking at, try using 10ml of calmag per 10L