There is no such thing as cheap Xenons. There are cheap crappy ass bulbs all over Ebay that claim far more than they could ever live up to. Just look at this crap they spout off as the God-given truth:
Xenon gas filled, Extended life
Our 65w or 55w bulbs would act as 100w bulbs
50% brighter than original stock headlights
No overheat (wiring is protected)
A Pair of Super High Intensity Discharge HID Xenon "High Beam" Headlight Bulbs!!!
A Pair of Super High Intensity Discharge HID Xenon "Low Beam" Headlight Bulbs!!!
Super White, 12V, 5000K, 80W/100W Output, Gas filled!!!
Give The Looks Of Headlight Just Like The Luxury Cars!!!
The PLASMA XENON H.I.D bulbs use the latest revolutionary "XENON" GAS 30% filled with pure xenon gas! technology which enables it to perform at the same level as H.I.D. (High Intensity Discharge) lamps found on premium cars.
It DRAMATICALLYimproves visibility at night and during bad weather conditions. The new "xenon gas" technology supercharges the energy in the bulb to accelerate the rate it moves and DOUBLES THE BRIGHTNESS.
If any of this were true, why would car makers put $1000 true HID systems in their cars when they could just replace them with bulbs that cost $2.50 a piece?
Honestly, for $16.94, what do you have to lose? It's not like it's a huge investment that needs massive researching. You know they're going to suck, they're selling 4 bulbs for $10! You can't even get OEM bulbs for that cheap, how the hell do they make bulbs with 'superior new technology' and 'twice the brightness' for a quarter the cost?