Looking back in the posts, it looks like 32 credits are needed to graduate, so a normal course load is 4 courses. This means that each course is equivalent to 4 credit-hours at schools using the credit-hour system. This means that one course should have 12 total hours per week of work (including in-class and out-of-class time). Looks like this particular lab is more than that, but it is likely that there are other courses at the school which are less than that.
At schools where all courses have the same credit value, it is likely that differences in workload per credit are larger than at schools where credit values can vary.