JMeter load test time frame

I'm doing load test using JMeter, I have 1 thread group which simulate user browsing pages, the load I want to test is 600 users in 1 hour time frame, so I configured my thread group as Number of Threads: 600 and Ramp-Up Period: 3600. However the test run 5 hours to finish, so I'm not sure the time frame of the test, is it 1 hour or 5 hours?