After my break I'm pretty sure 2 bowls should have me set for like 5 hours lol. But my highs usually range from 2 to 3 hours and the after effects always seem to have control on me until I take a break. Think I'm lying if you want but I swear I feel under the influence by THC all day everyday until I take a break from it altogether. Then I feel great. But to make the highs last longer the obvious answer it to smoke more .