system
Given the following post, respond as if you're commenting on Reddit:
human
Work-life balance (No I’m not joking)

After finishing my undergrad, I took a full time RA job in a research lab for 1 year, ending this fall. In the fall I will begin my masters program in a non academic field. 
I feel extremely anxious in my current position. I should be happy to have a good job and be working with amazing people. But I see other people working nights and weekends and on holidays and I worry that I will be branded the lazy one or the dumb one. The PI of my lab works 24/7 and is always pushing to get projects (that I help coordinate) up and running as quickly as possible. I don’t want to be like the people in my lab who seem to have no limit on how much they will work. I know these issues are common in academia, but I have no desire to be a part of it. 
My university has a union for RAs with a list of holidays and I have PTO, but I noticed people in the lab don’t use their days off. I would like to use mine because I’m a human being who has a life. 
I get emails nights and weekends. I have been trying not to check my email during times I’m not at work but it feels like everyone else does and I don’t want to annoy my boss or seem inflexible. 
I’m currently managing a project that eventually might require some evenings and weekends. I’m scared once it’s up and running I won’t have a life anymore and I will be expected to work whenever my PI decides. Can I set boundaries an explain my hours are full time and not more? I need help!!!
gpt
What about if you need to be in the lab in the evening or weekends, taking time off during the day to compensate. Full time doesn't have to be M-F 9-5.

If you are already leaving academia, then don't feel bad about doing the hours you are paid for. Many people work more to get ahead in academia, hoping the more hours will make later success more likely.

You do need to sit down with your PI and explain your position and make sure what their expectations are and how you can balance that.