Looks to be stretched. Have you put it in flowering? Also have you been using those lights through out it's whole growth cycle? Next time get something more in the blue spectrum. Now I guess it's fine if you can only afford one light but due to the stretching if that plant is'nt restricted it might produce buds that may cause that plant to need some type of support to be up-right. Also I dont see any pre-flowers and yes Don Don that is a cannabis plant .