New headlights

I was flipping through a mustang mag looking for some cheap upgrades to the stang and I saw an ad for the Xenon headlamps. They were $14.95 each and I was wondering if these are the halogen lamps that alot of people upgrade to and if it is a good, cheap, simple upgrade. If it is simple and this cheap i will do it but i needed to hear a second opinion.
 
I have.... Delta H4 Xenon Hi/Low Headlamps. These are $50 at CJ Pony Parts. They have the blue hint to them and are noticably brighter than the Halogens.

The ones you saw are probably the Halogen lamps. They are better than the stock headlamps.