NRS 484D.180
Spot lamps, auxiliary lamps and lamps for fog.
1.
Any motor vehicle may be equipped with not to exceed two spot lamps and every lighted spot lamp shall be so aimed and used upon approaching another vehicle that no part of the high-intensity portion of the beam will strike the windshield, or any windows, mirror or occupant of a vehicle in use.2.
Any motor vehicle may be equipped with not to exceed two auxiliary driving lamps mounted on the front at a height not less than 16 inches nor more than 42 inches above the level surface upon which the vehicle stands. The provisions of NRS 484D.210 apply to any combination of headlamps and auxiliary driving lamps.3.
Any motor vehicle may be equipped with not to exceed two auxiliary passing lamps mounted on the front at a height of not less than 24 inches nor more than 42 inches above the level surface upon which the vehicle stands. The provisions of NRS 484D.210 apply to any combination of headlamps and auxiliary passing lamps.4.
Any motor vehicle may be equipped with not to exceed two fog lamps mounted on the front at a height not less than 12 inches nor more than 30 inches above the level surface upon which the vehicle stands and so aimed that when the vehicle is not loaded none of the high-intensity portion of the light to the left of center of the vehicle shall at a distance of 25 feet ahead project higher than a level of 4 inches below the level of the center of the lamp from which it comes. Such lighted fog lamps may be used with lower headlamp beams as provided in NRS 484D.210.
Source:
Section 484D.180 — Spot lamps, auxiliary lamps and lamps for fog., https://www.leg.state.nv.us/NRS/NRS-484D.html#NRS484DSec180.