Doing ~12 hours right now. 15-20 when there is a deadline. 8-10 hours is not really time consuming, even if you have a full courseload like ~16 credit hours.
I was like you OP when I started out looking for research. Worst interview ever.. Funny story...I went to discuss with a PI, looking for a position my freshmen year (not my current lab) :
PI: Looks like you have a 3.6 gpa...so what do you want to do after undergrad...
Me: umm...I would like to go to medical school..
PI: You know that you its strongly recommended that you need a 3.8 gpa right...
Me: 🙁 (this guy is killing my hopes...)
PI: I just want to let you know I don't write LORs anymore since I have had too many premed students who don't spend enough time in lab..
Me:😕
PI: Anyway why are you interested in this lab...
Me: Because nanomedicine really interests me...I actually did a research paper on it back in my gen. chem class😎
PI: Oh so what did talk about in your paper...
Me: ummm....(me rambling bs) stuttering...
PI: (He then proceeds to ask me a question on the structure of carbon nanotubes..)
Me: (long silence, felt like a lifetime)
PI: Its okay if you don't know the answer...you should have just asked me
Me: sorry...my paper was mostly on the ethics of nanomedicine 🙁
.....After some more talking
PI: So this lab is going to require a lot of work (emphasized a lot on the intensity of the work), at least 10 hours...Here is the lab manual..and before you join the lab, you should meet all the coworkers and ask about their projects to get to know them and get ideas for your own project.
Me: okay...
Conclusion: I never joined the lab, even though the research was really interesting. I was too intimidated by the end of that interview...I think he just doesn't like premeds in his lab..haha