Exposure Lights Diablo review from Velo News tech editor Zack Vestal

This appeared in the April issue of Velo News, page 64 "Commuter Gear".

"The Diablo headlight is a compact, powerful and sophisticated front light. It's petite and versatile for commuting, but adequately powerful for threading a little singletrack after work.  In contrast to the Light and Motion Stella series or the MiNewt from NiteRider, Diablo is a self contained unit, with the lamp and the battery housed in a machined aluminum body similar to a small flashlight.  Other companies make self-contained lamp and battery lights, but at 700 lumens claimed output on "high," the Diablo is much brighter than anything we've found of its type. Plus, at just 130 grams with the included aluminum quick-release handlebar bracket, it's very light. 

One cool feature is the Smart Port, which functions as an input jack for piggyback batteries to extend burn time, a jack for a handlebar mounted remote on/off switch, or an output jack to power an accessory helmet or seatpost mounted rear light.

The Diablo has four light settings (high,medium, low and flashing) toggled via a single on/off button on the rear of the light body. Claimed burn time on high is one hour, but in a test burn I coaxed almost 90 minutes out of it. Running the light at lower output extends the burn time significantly. Time to full charge is about four hours. Burn times and basic operating information is conveniently etched on the light body. The on/off button doubles as a charge/low battery indicator light. 

After a few months of commuting in all conditions, I've found it to be a sweet little light. It's visibly brighter than other lights I've used, and throws a nice focused beam with just enough dispersion for peripheral vision. Plus, the flashing mode is great for safety in high traffic intersections. The construction is bomber. I love the absence of battery cables and heft, especially when used with the included helmet mount. The aluminum handlebar bracket works well, too, but installation requires a 4mm Allen wrench. It's quite secure, but I switch bikes frequently, so I need to swap the bracket from bike to bike, which isn't quick.  Additional handlebar brackets are available separately." - Z.V.