Sure... what the hell... lets take a stab at it.

Brown tips: (Nutrients: Manganese, Zinc, Iron or Potassium deficiency.) (Environment: Excess heat, lack of water)

Yellowing of the leaf: Nitrogen, Potassium, Zinc, or Sulfur deficiency.

Small scrapes and scars on the leaf: (Pests: White flies or thrips.) (Environment: Lights could have been too close to the plants and burned them.)

Sad state of affairs for sure. Poor plant!:wtf3: