H13 bulb size is available for both HID and LED systems. It is a very common upgrading for headlights and fog lights though not that often. There are 3 HID options carried for this size: Bi-Xenon, Lo/Hi Halogen and Single beam bulbs. LEDs are only available in dual beam option meaning you will have one bulb both for High and Low beams.
Dual beam bulbs can be differentiated by a 3-pin connector to the factory wiring harness.
H13 bulbs are used to replace OEM H13 Halogen bulbs. If you are not sure about the right bulb size, you can look it up on the bulb itself or in the owner’s manual of your car. These products are designed to meet the requirements of those who want to have their car lights as bright as possible.