Low strengths normally continue for about an hour, medium strengths work for about 2 hours, along with substantial strengths go on for about four hours. Last but not least, what strength of THC don't you wish to vape? You can find three major strengths of THC vaporizers: low (10 20 mg), medium (25 40 mg), and substantial (45 80 mg). On the other hand, CBD products and solutions may have a much...