500lumen headlights are so cheap nowadays I wonder if they are good quality. A lot of them listed in Amazon come from China and don't have brand names I recognize or have reviews on Youtube or Google searches.
My 250lumen Petzl still works but I get frustrated with the smart detector: I think I had set it at the highest luminosity when riding about an hour before sunset or dark cloud conditions then I find out the smart detectro had turned my light off.
Ideally I'd like a really bright light in the daytime so drivers trying to turn left across the street at the intersection will see my light glaring at them. The same deal when I try to make eye contact through darkened car windows.