That cree t6 looks the kind of thing I had in mind and its cheap really...how long does the battery pa k last while riding? I'll need it to light my way fro around 90 minutes there then 90 minutes back
I've ridden for 3 hours with the T6 on the lower light setting with no problem, but I have the impression that the stronger beam setting eats up power a lot faster. Still, I think 90 minutes should be fine even on that, but wouldn't be too sure about 180 minutes. However, I've never really put it to the test so I don't know the absolute limits. Do you have anywhere to charge it up during the day?
I have found though that in low (around freezing) temperatures the battery drains a lot quicker and twice it has suddenly gone out on me with little warning, so I have now bought a second set so that I can have a relief battery with me just in case. But even saying that, I was doing 45-minute commutes all through last winter with no problems, I just made sure it was fully charged each day and packed the battery somewhere warmish, in a pannier or a pocket.