I'm 49, female, mostly fair weather commuter. I bike commute 3 seasons, and take public transportation in the winter. I have lights on my bike, but I just don't feel very visible at night, plus since most of my commute is on the MUP, it is very dark and while I'm not afraid of people or animals (deer, mostly), I just like to see where I'm going. I'm also would like to add that I got my husband hooked on bike commuting and now he outrides me.