Have been using a NiteRider Lumina 650 for the last couple of years attached to my helmet, and find it excellent. The strobe function makes it excellent for daytime commutes a couple of days each week. On 650 lumens can easily light up a stop sign 1/2 city block away. Being able to charge it using USB port means I can detach it from my helmet mount and use it when on travel, or at night as an emergency flashlight, as well as when on routine walks with a local walking group (three levels of luminosity). Also came with a handlebar mount. While pricier than many flashlights, think it is worth it. Only downside [NiteRider can you improve this?] is the somewhat flimsy white plastic (latex?) on/off/settings button that will weaken/be subject to tear over time. This has been true for each of the NiteRiders that have bought since 2014. My solution to the design flaw is to place a few inches of painter's tape over the top of the light so do not apply direct pressure on the thin, soft plastic, on/off/settings button, and that protects the button.
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