The 1999 Acura TL uses a D2R bulb for the low-beam headlight and a 9005 bulb for the high beam. The D2R application indicates the factory low beam uses an HID bulb, while the high beam uses a separate halogen-size 9005 bulb. The 9005 bulb is also listed for the daytime-running-light function.
For exterior lighting, the front turn signals, parking lights, and front side markers use 1157A bulbs. Rear lighting includes 7443R bulbs for the brake and tail lights, a 7440 bulb for the rear turn signal, and a 7443A bulb for the rear side marker. Reverse lights use 921.
Interior and utility lighting has several listed options by location. License plate and trunk lights may use 168 or 917; floor, glove-box, and interior applications may use 194 or 7441. Map lights are listed as 2825 or 98, and the vanity light uses 6612F. No fog-light bulb fitment is listed for this model year.