The H4701 automotive bulb is a halogen bulb with a single beam lamp and one filament. It is commonly used as a replacement part for low beam headlights in older vehicles. The bulb utilizes halogen technology and has a nominal power of 12 volts and 50 watts. The H4701 bulb is designed for use in reflector headlights and has a typical lifespan of 1-2 years. Its name is deciphered as follows: H for halogen, 4 for the bulb's diameter in eighths of an inch, 7 for the bulb's depth in eighths of an inch, and 01 for the bulb's shape. The H4701 bulb has a P43t base and produces 1000 lumens with a color temperature of 3200K. This bulb is interchangeable with other H4 bulbs.