I just got back from a club ride and it was getting quite dark at the end. It was on a bike trail (24 miles) with many shady sections, and the last few miles it was so dark you could barely see oncoming also not illuminated bikes. And at this hour it's pretty serious riders so the potential for a bad collision is definitely there. The club wants everyone to have lights, and up till now I haven't needed one...

Needless to say, it's time to get one. My problem is I am very handlebar real estate poor. I have my compu on one side, and since I don't have a 2nd set of bosses, I have a bar mounted 2nd bottle holder. I am not sure how I will solve this problem.