6 weeks still small bud, 2 weeks left

hey guys its week 6 and i have 2 weeks left, im 21" tall clones under 1000 watt hps cooled room. my buds are still small but there only alil bigger than popcorn size. they have massive trichomes all over them and the humboldt and papaya are turning purple. i mean the frost is something nasty like in the books, but my size is crappy at 6 weeks

throw up some pics

IDK, maybe you had a light leak at some point? That'll give you 'airy' buds, as will being piollinated, or giving them too much N(not likely, unless you gave them a bunch of veg fert, during bloom?) Hard to say. But, I can say that's your light isn't the problem, that's for sure. With 1000 watts, you should have some nice dense nuggets. Any pics?