NRS 486.251: Use of head lamps and stop lights required.

1. Every motorcycle or moped operated upon a highway of this State at any time from one-half hour after sunset to one-half hour before sunrise and at any other time when, because of insufficient light or unfavorable atmospheric conditions, persons and vehicles on the highway are not clearly discernible at a distance of 1,000 feet ahead must display lighted lamps and illuminating devices as respectively required pursuant to NRS 486.011 to 486.381, inclusive.

2. Every motorcycle or moped operated upon a highway must be equipped with stop lights to be lighted in the manner prescribed for the use of such devices.