HID is known to be a type of light fixture that may be used by people because it will be able to produce light for a longer period of time. It will also produce a brighter amount of light as compared to the other alternatives. Xenon, on the other hand, is a type of gas that can also be used as a light source. If this would be compared to HID, the type of light that it will produce may not be so bright. The thing about this is that it does not need to warm up anymore before it can be used. HID lights would need to be warmed up first. The type of light that will be produced by Xenon is also warmer as compared to the bright white light produced by HID.
If in case you are confused about where these terms are used, Xenon and HID are terms that are used for light. Xenon is considered to be one of the types of lamps that you can get right now. It will have enough pressure inside its bulbs to produce a bright type of light. HID is considered to be even better as compared to Xenon when it comes to providing the type of light that people may want. One difference between the two is that HID lights would need a bit of warm-up before they can be used while Xenon lamps will not need it anymore so that they can work properly.