Below is a list of light bulb types used in 1998-2005 VAUXHALL ASTRA lighting system, covering convertible, estate, coupé, hatchback and saloon 4-door vehicles.
Headlight bulb: low beam - D2S or H7 / high beam - H7 or HB3
Parking light bulb: W5W
Fog light bulb: H3
Front indicator/turn signal bulb: PY21W
Side direction indicator bulb: W5W
Rear indicator/turn signal bulb: P21W
Tail light bulb: P21/5W
Brake light bulb: P21/5W
Back-up light bulb: P21W
Rear fog light bulb: P21W
License plate light bulb: R10W or C5W
Interior light bulb: W5W
Boot light bulb: C10W
Light bulb sizes for other VAUXHALL ASTRA generations: ASTRA (H) / ASTRA (J) / ASTRA (K)