What’s the longest you’ve ever stayed up in the lab at night?

Question: What's the longest you've ever stayed up in the lab at night?
- Keywords:
  lab
Asked by Chimæra to Valerie on 9 Nov 2017.
- Valerie Bentivegna answered on 9 Nov 2017:
  
  One time I was working with a very sophisticated machine that a lot of people wanted to use, so we had three days to do a particular experiment. On the first day, we had access to the machine, we stayed until 3 am.
  
  My supervisor gave me a few days off after we finished the experiment, though.

Question: What's the longest you've ever stayed up in the lab at night?