It varies WIDELY from day to day, project to project, etc. I have days where I produce no code at all (often doing misc paperwork), and other days where I code 6-7 hours per day.
Lines of code is pretty meaningless as a metric, since different languages can express different amounts of logic in a line of code. Additionally, depending on the type of project I'm doing, I can sometimes copy hundreds of lines from an external source, do a regex search/replace, and have hundreds of lines perfectly good code.
Great to be back in the field.