I recently hiked out at night using a strong led head torch. The problem I had/have is judging the height of rocks and roots when stepping, everything looks flat, not so if holding a torch in my hand, just can't use poles. Other cons: more potentially bad animal encounters. No views. In icy conditions hiking at night could be dangerous. Should only hike on well marked trails and not doing cross country. Orienteering more difficult. Cooler to walk at night, but tough to sleep in hot weather during the day. Pros: cooler in hot temps, night blooming flora, views of night sky and far away lights (ie: Atlanta from top of Blood Mtn), fewer people.