Anyone else skip lunch to get out earlier?

Quick question - I've been skipping lunch most days (eating at my desk if I eat at all) so I can leave by 4pm instead of 5pm. Gives me an extra hour with the kids before they get crazy at the end of the day.

My energy tanks around 3pm though. Is this sustainable or am I being dumb? Wondering if anyone else does this or if there's a better move.