forget higher wattage bulbs, not only do they burn much hotter they also overtax the wiring loom, watts equal amps times volts, you have a 12 volt system therefore every 100 watts loads the cables with 8 amps.
Ordinary bulbs will still give a yellow light and the difference between 55 watts and 100 is negligable, you can also ignore all the hype about Zenon gas filled bulbs as it makes no difference as the light output is generated in the same way as a standard bulb (The element glows)
Best go for a HID conversion set, H7 is the type for the Boxster and each bulb draws only 35 watts but produce 2.5 times the light with a much lower temperature, colours at night are more realistic.
They are dead easy to fit and you need only very basic skills to do, most packages come with instructions and providing you can read you can do the job, they are also fully legal and will not affect the MOT.
The bulbs also last 5 times as long (usually the life of the car)
In HID (also known as Zenon) it is the gas that burns, not an element
Look on E-bay, prices around £150 to £200
I changed mine 3 months ago, passed the MOT in September and look great, driving at night is much better and the road more clearly defined.
One last thing, i do not have anything to do with selling HID, i really am a very happy and satisfied customer
Glyn
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