I am running Serious seeds white russian, I have harvested twice now from seed and will harvest again in mid july, growing in two rooms, one for veg the other for flower, 600w metal halide in veg and 600w high pressure sodium in flower, both times the buds end up light and airy, smoke is good, plenty of trichomes, yeild is good but the buds are not dense, I keep the light as close as possible to top of cola without burning, temps were 75-79 range, per Serious seeds the plant should have dense buds. the harvest coming mid july I expect to have problems as I had heat issues for a couple of weeks. I have changed the set up for the future plants now in veg.Added 2 lights to veg room one hortilux Blue and the other metal halide both 600w, also flower room has 2 high pressure sodium, the last harvest was one plant only so it got all the light with no other plants, the 1st harvest was three plants about 4 1/2 foot tall, I use maxibloom all the way through. I have started adding floralicious plus all the way through veg and bloom, what is missing that needs to change for dense thick buds?