I don't know about the specific bulbs used in cars but in general LEDs last much longer than CFL or Incandescent bulbs. LED bulbs on average last 50000 hours of use whereas CFL (Which are the typical Automotive headlight) last 10000 hours. SO your LED bulb will last you 5 times as long.
Considering this, why are my car headlights so dim?
Most DIYers think they've got a bad headlight switch or a bad connection in the power feed. But most dim headlights are caused by a corroded ground wire. Just trace the wiring harness from the back of each headlight assembly and see where it connects to the vehicle body.
How long should your car headlight should last?
How long should a halogen bulb last? The typical longevity of a halogen based headlight bulb is between 450 and 1,000 hours.The calculation of the lifetime of a bulb depends on a number of factors. This means that there's no simple and universal answer to the question of 'How long will this bulb last?'.
How often do you need to replace headlights?
Halogen headlights may last 450 to 1,000 hours while HID lights average 2,000 to 3,000 hours. With such a lengthy lifespan, which translates to about 90,000 miles of usage, JD Power considers HID headlights a "lifetime" bulb that never needs to be replaced.