"at least 8 hours long, during which the character sleeps or performs light activity"
Those are 2 separate options. Standing watch for no more than 2 hours is an example of light activity. What you are saying is "sleeps and performs light activity of no more than 2 hours," if I read your position correctly. I agree we're getting off track, though.
Those are 2 separate options. Standing watch for no more than 2 hours is an example of light activity. What you are saying is "sleeps and performs light activity of no more than 2 hours," if I read your position correctly. I agree we're getting off track, though.