Need a light with a powerful output that simultaneously highlights the edge of the trail, without compromising the far-reaching beam, & automatically adjusting output in tune with the terrain? Then look no further than the Exposure Maxx D MK13. The Ma Xx D MK13 is perfect for aggressive riding on singletrack & technical terrain, thanks to its combination of lenses & Reflex Technology. Reflex automatically adjusts the light to provide boosted output when riding hard & fast then intuitively dimming for the slower sections such as climbs. This is all to optimise battery capacity, to provide extra light when needed & save it when not required. Reflex achieves this by using data from 3D digital accelerometers including gyroscope & thermistors. It continually analyses the data to make seamless adjustments to benefit the rider, probably better than the rider can. In reality it is a form of artificial intelligence. The selected run time will be achieved by averaging the output over the period. Various programs in the lights can easily be selected to offer a choice of run times & modes so you can find the right one for your ride, be it an all-night adventure or an intense blast.