There are three different types of tail lights available for the 2002 Honda 400EX. The first type is the incandescent bulb, which is the most common type found in vehicles. This type of bulb uses a filament that glows when electricity is applied to it, providing illumination. The second type is the LED (light emitting diode) tail light. This type of light uses a semiconductor to produce light, and is much more energy efficient than an incandescent bulb. LEDs also have a longer lifespan than incandescent bulbs. The third type of tail light available for the 2002 Honda 400EX is the HID (high intensity discharge) tail light. This type of light uses a gas-filled capsule instead of a filament or semiconductor, and produces a very bright light. HID lights are also quite energy efficient, but can be more expensive than other types of tail lights