You'll be glad you got brighter lights after you use them. Most of the pedestrians I see on my commutes are on the bike path, and most of them are dressed like the one the OP saw. When I finally got lights bright enough to be useful I was able to see the pedestrians far enough away to give me plenty of notice they'd already noticed me and had time to respond. Then I only had to try and decide if they wanted to act in a way that made it easy for both of us to pass or not.