I just spent hours reading all NORML studies and other temp THC related things. From what I gathered, 392 farenheit is highest temp needed to get the most THC possible, with 365-392 being the best range. Anything your reading about 400 range is borderline combustion & the whole point of vapes is to get away from that. I personally see best results in the 370s range on my Volcano Digit.:rasta: :vap_rasta: