Not for the bike or helmet, but something to let me see while walking.
If we get any snow here, it's going to be safer for me if I get the bike of the streets and hike in the grass. Don't want to have to carry/hold a flashlight for the 2-3 mile hike home after work. Also will come in handy on those days that I walk due to bike being down for repairs.
Might be something for the touring crowd who camp, but figured I'd post here first.