In college, I experimented on myself to see how much I needed. I found that <5 hours over time led to bad things for me (hallucinating, shaking), and surprising

In college, I experimented on myself to see how much I needed. I found that <5 hours over time led to bad things for me (hallucinating, shaking), and surprisingly that >7 made me groggier than anything in between 5 and 7. So that's what I shoot for.