Xtreme White Plus is PIAA's best-selling technology. These bulbs will provide a brilliant Xtreme cool white light that will light up road hazards and street signs long before a normal halogen bulb. Xtreme White Plus bulbs are engineered for sustained Performance in applications where a high level of vibration and moisture protection is required. PIAA bulbs are engineered with XTRA Technology for greater Performance per watt compared to the competition. XTRA Technology is achieved when a proprietary gas mixture is combined with an aerospace alloy filament that produces greater light output than its rated power consumption: i.e. 55W=110W
H4 XTreme White Plus Anti-Vibration Single Halogen Bulb installation instructions
2 fois plus de lumière, par rapport à une ampoule H4 traditionnelle, pour la même consommation électrique
This bulb is way brighter than my standard bulb and helps me avoid those pot holes and road obstructions at night. Love it so far. Quick delivery. Also like that I was able to use PayPal. Thanks for a good product.
This bulb produces 5 star light: I used one for about 1.25 years and it lit up the road even in heavy rain. A single cloudy lens with this bulb on high beam bothered oncoming drivers (some even on low beam) so make sure it is adjusted correctly. I have been trying out HID's and LED's to lower power consumption (due to a tiny alternator in my 78 GoldWing); however expect to return to this bulb and stick with it.