Very seldom any more, since retiring. My longest darkest rides were winter commutes in Seattle. Now it's mainly riding a few miles home from the brew pub or theater, a couple of times a week. Or getting an alpine start at oh-God-thirty for a long day in the mountains.
I've been retired long enough that I missed LED lights for commuting. Now that I don't commute any more, I have the brightest, lightest, cheapest bike lights imaginable.