The Cateye Volt 400 XC is an effective, bright and robust light – but the mount isn’t the slickest we’ve used and the light is a little short on settings.
The Volt 400 XC, as the name suggests, has a maximum output of 400 lumens, but it also has three other settings: low (100 lumens), hyper (a constant beam punctuated by a flash) and flash.
On full beam, you get just about enough light for use on unlit roads, although certainly not enough for anything off-road or technical. That places the Volt 400 as a powerful commuting light and one for occasional trips into darker territory, but not a dedicated night riding light.