Usually no issue as long you don't have the cheapest lights, wouldn't trust these.
Make sure u have all cabled put a way cleanly and ensure doesn't touch hot surface.
Else this isn't such big deal, I have even left for 4 weeks once without an issue.
Best time to go away is after stretch (21 day flower), veg u will miss training a bit, stretch is pretty bad can't control plant at all, but with just one week you will be fine generally especially if you have someone checking on it frequently.
Last but not least most fire hazard is chaining power strips.