Just replaced the headlamb bulb with an Osram Silver Star Xenon.
Its hard to find words to describe the difference. The Osram ones are the most highly rated by the motoring press even better than the Philips ones.
Its like having 2 headlamps instead of 1 with a much better spread of light and much better distance vision - it has to be seen to be believed !
They are completely legal in Europe and have the same 60/55W 12V power rating. The Osram ones are white not the blue type. The TB family require a single H4 bulb (3 prong combined high and low beam)
Ive put them in my Sprint ST as well same effect. Got mine from
http://www.powerbulbs.co.uk/ I know that they are on for sale in a lot of places at the moment including eBay.
A big improvement !