As promised, some feedback regarding the L&M Solo. I got the light yesterday. It is very solidly constructed. The light itself is made of fiber-reinforced thermoplastic. The bar mount has a nice rigidity to it compared to clamps that come with cheaper lights. The lighthead can be turned side-to-side, up-and-down and the beam width can be adjusted by rotating the bezel. The light is very powerful and the pattern is excellent with good lighting on the periphery of the main beam regardless of the width (L&M says that the pattern spans 180 degrees, and this claim is fairly accurate). The "throw" of the beam is quite long and seems to be more than adequate for my commuting purposes. The battery weighs about a pound and comes with a strap so that it can be secured to the frame. The kit comes with a helmet mount; I don't plan to use this for now since I would have to then lug the heavy battery in my pocket. The charger is a trickle charger type. They recommend buying a timer to prevent leaving the charger on the outlet for too long. I wish I had bought the "turbo-charger" that has dT/dt monitoring.

Overall, I am happy with the purchase. I haven't actually taken it out for a spin, but will do so soon and report the details.