Bulbs By Bulb Type P21w, Pilot Available here. Car bulbs are essential for ensuring visibility and safety while driving, especially at night. There are many types of bulbs: halogen, LED, and HID (High-Intensity Discharge) bulbs, H1, H2, H3, H4, H7, H11, H13, HB3, HB4, H15, H16, 9005, 9006, 9007, 9145, D1S, D2S, D3S, D4S. Halogen bulbs are mostly used for headlights and fog lights because of their bright and warm illumination. LED bulbs are the most energy-efficient and long-lasting and are very commonly used in tail lights, indicators, and interior lights. HID bulbs, known for their intense brightness, are often used in premium vehicles' headlights.The best-known bulb brands are Osram, Philips, and Hella. OSRAM has two key ranges: ULTRA LIFE, renowned for its durability and longevity, and NIGHT BREAKER, offering up to 110% more light on the road. Philips offers a variety of high-performance car bulbs for headlights, rear lights, indicator lights, DRL, and more. Choosing the right bulb from renowned brands can significantly improve your driving experience at night. Shop Car Bulbs Ireland