The "crystals" are tricombs wich are not really crystals they are little opaque stalks with a liquid ball on the end of them, which is where most of your thc comes from. when they get milkey to amber is a good time to harvest. I would get at least a 16x hobby loop to look closer its fun and might make your mouth water cause it looks like little rain drops up close. as far as your light it looks as close as you can get it now good job man. I am in week 5 of my grow and made a couple of mistakes but adding more light during there light period will not hurt at all.:thumbsup: