What phase will the moon be in when you hike? A super moon would light your path....
Aug 10 full moon
if you are leaving WP at MN, then the full moon will be lighting the path. That can make it so bright you might not need headlamps at all, especially away from tree cover.
Once eyes are adjusted away from car headlights, some people can do without. Not typical, but possible. I have gone up the trail a bit with headlamp, then turned it off and sat still for 15 minutes going nowhere while allowing my eyes to get to that point.
Try to aim for arrival at TrailCamp just before 600. The beautiful cinnamon-rose alpenglow on the east face of the entire Whitney massif lights up about then. Only lasts for 5 minutes, 10 max.
