The MAXX D MK9 is considered a trail specific light but one could use it on the road. The stated "Refined Reflex Plus enables the MaxxD to throw 3200 down the trail and chases off the shadows for flat out riding" is interesting.
After 2 months of use there are some gripes. 2 lights running on the same trail at the same time. One light will have significant deeper state of discharge. Example: 12/29/16 single track for 1 hour, 7.6 miles, 1300 feet of climbing. Light A has a 94% discharge. Light B is 64%. Just one example. Its consistent with the level of discharge while being unused also.