Since the days were getting shorter, I just bought a pair of Knog Frogs. Here's the criteria I needed to meet:
Riding on well-known roads at pre-dawn hours - normally about 15-20 minutes that requires lights, but never in pitch black
- Rides lasting about an hour (very different requirement from the 24-hour MTB races many lights are designed for)
- Didn't want a separate battery pack
- Unobtrusive enough to leave on my bike all the time
- Battery-powered, not rechargeable (as per the "leave on my bike" thing above)
I looked at the Blackburn Flea which has 4 LEDs and about 40 lumens, but ultimately decided on a pair of Knog Frogs. Each one throws off about 10 lumens. By way of comparison, a decent 24-hour race-in-the-woods-in-the-middle-of-the-night headlight casts some 500 lumens. My Knogs will help you navigate a dim parking lot, but for singletrack at 3am I'd try something else.
Still, they do what they were intended to do, which was to get me out of the house by 6am, even if the sun's not up until 6:30am. I have one wrapped around either side of my stem. I mounted them underneath the bars so that they don't interfere with the wind port of my iBike, and also because the bars shield the LEDs from me, so I don't experience temporary blindness each time I look down at the iBike to check my power (damn, still 178 watts).
I picked them up at Conte's in Bethesda. When I did, I meant to buy 2 for the front but mistakenly bought one front, one rear (red light). They look exactly the same except for a sticker on the packaging, so be sure to look closely. But I decided to keep the rear Frog anyway. Post-mounted blinkies rub my prodigious thighs when I pedal, but I mounted the Frog on my seatstay just above my rear brake and below the seat tube junction. It's just as visible there but completely out of my way.
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