For the 1999 Land Rover Discovery, the low-beam and high-beam headlights both use a 9003 bulb. The fog lights use H1 bulbs. No headlight-type or projector distinction is specified in the supplied fitment data, so verify the existing bulb before ordering.
For exterior lighting, the front turn signals are listed with two possible bulb options: 7506 and 2825. The rear turn signals and reverse lights use 7506. The tail and brake lights use 7528, while the center stop light uses 7506.
Other listed bulbs include 2825 for the parking lights, front side markers, and courtesy lights; 5007 for the rear side markers; and 6418 for the license plate and glove-box lights. The dome and map lights use 6461, and the trunk light uses 5008. Check the lamp socket and vehicle before replacing bulbs where multiple options are listed.