Anyone can claim to sell you a Xenon bulb, but be sure you know what you are buying.
When individuals are sold Xenon bulbs, a majority of the time, you are led to believe you are buying the HID kit, or that the result will be similar to that of the HID bulb.
This is not the case, the Xenon bulbs (halogen/xenon) bulbs are not technically true xenon bulbs (although some of these products contain a trace amount of the gas), they have a blue filter on the glass casing that eliminates the yellow colour discharged by the conventional bulb. The result being a whiter halogen bulb.
At best, these bulbs will burn with a whiter light, they may in some cases increase visibility by up to 30%, but thats about it.
The true XENON/HID bulb speaks for itself (see the customer cars tab).
The structure of the bulb is totally different, the light output in some instances is 5 times greater, meaning that there is more range, more depth and more light coverage on the road.