Light time stat's shows way more then it actually took

I’ve realized that something is odd when looking at the lighting time. I’m pretty sure that my lighting baking didn’t take more then 1 hour but it shows 3.7 hours.

13579 / 60 / 60 = 3.7

Furthermore, when I look to the swarm log the beginning and end time match with less than 1 hour.

10:23:14 AM: [Interface:TryOpenConnection] Local connection established
10:23:14 AM: [Job] Accepted Job 86C5AA4D-4B44A187-0864F0BB-C151BEBE
....
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..
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11:11:04 AM: [MaintainConnections] All connections have closed