The H15 automotive bulb is a dual filament bulb with a nominal power of 12V: 55/15W and 24V: 60/20W. It has a PGJ23t-1 cap (base) and is primarily used for high and low beam headlights. The H15 bulb is also known for its DRL (daytime running light) function, which requires a lower wattage filament of 15/20W.
H15 Light Bulb
BULB CROSS REFERENCE
The H15 light bulb family is interchangeable with the following bulbs
It has a specific filament designated for the DRL function. This means that the bulb has two filaments, one for the low beam and one for the high beam, and a separate filament for the DRL function. The lower wattage filament is used for the DRL function to conserve energy and prolong the life of the bulb.
The H15 bulb is not interchangeable with other bulbs as it has a unique cap (base) design. However, there are other bulbs that can be used for the same functions as the H15 bulb. For example, the H11 and H9 bulbs can be used for low beam headlights, and the H7 bulb can be used for high beam headlights. It is important to consult the vehicle's manual or a professional mechanic to ensure that the correct bulb is being used for the specific make and model of the vehicle.