My machine is new.     Not had a chance to use it at all let alone in the dark.   I'll be useing it in the dark mostly and perhaps 25 per cent of my time will be in daylight hours.    Are you upgrading , or making do with the factory lighting ?  50 Kph is the most speed I would be doing at night and that's only on good tracks that I know are safe

[2015 Z Force 800 53/Trail EPS]

Probably something you will have to decide for yourself but spending 75% of it's running life in the dark...and probably way-outback in no man's land, might want a little extra. At least a small light bar..something that isn't a power-log..4 amps or less, and can be mounted low and out of the way yet give you more viewing width and distance then the OE lights.