In the case of street motorcycles, the headlight feature is a mandatory feature as per the prevailing laws in the country. Vehicle policy calls for a headlamp system to be placed on the front and rear of any two-wheeler on the road, with the purpose of simultaneously seeing yourself and making your position visible to others on the road at night. So motorcycle companies have headlights as a stock in street bike designs.
But in reality stock headlights may not always meet the needs in all kinds of situations. Headlight upgrades and modifications are needed to deal with such a different situation. 
 The article will discuss motorcycle headlight system - hadlamp upgrade and auxiliary lights.
Since it is mandatory for street motorcycles to have a headlight system in the country's customary law, the design of a street motorcycle must have stock headlights. Even mountain bikes or motorcycles suitable for unfavorable roads are designed with stock headlamp system.