H11 (H8/H9)

People often ask if H8, H9 and H11 are the same or different. They fit the same but they vary by the wattage and light output in their HALOGEN form. An H11 halogen bulb has a 55W filament optimized for long life at the expense of lower light output. H11 55W is most often used in a low beam position. An H9 halogen bulb has a 65W filament optimized for maximum light output at the expense of shorter lifespan. H9 is most often used in a high beam position. H8 halogen bulb has a 35W filament with a much lower light output that the H9 and H11 bulbs. H8 fits the same as H9 and H11 but the bulb tabs are thinner than those of an H11 bulb and may need to be adjusted for an LED bulb to fit the headlight. H8 is normally used in fog lamps.

NOTE: Japanese cars and trucks label H11 bulbs H16, but in fact they are H11. The true H16 bulbs are used in fog lights in domestic vehicles. 

When upgrading to LEDs, if you match the power draw between the halogen and the LED, then you will have less issues with lights shutting off or needing canbus decoders.

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