Your killing some of your babies... Looks like a K deficiency when it yellows around the edge and the tips wither. Your also killing your Lemon Haze with to much heat, the light might be to low and keeping it in the corner is not a good idea. The wall covering should be perfectly flat. Some of the leaves look awfully pail green too.. You may have more problems than you realize...Sorry about the news.

A great book to buy is Marijuana Horticulture, The Indoorr/Outdoor Medical Grower's Bible by Jorge Cervantes. Great book, made me realize I knew less than I thought I did. No sense spending $7K on a grow room just to kill your babies. The stress will reduce the quality and your yields considerbly too. Thought you had a Guy???

Just a heads up. Unfortunatly, its all trial an error. GOOD LUCK!!!