I replaced my 260e's US-spec lights with Euros earlier this year and the difference in brightness and road coverage is tremendous. Adding good quality faux "Xenon" hyper-white bulbs (Eurolite), made it profound. They are incredibly strong.
Also, the car looks sleeker, sportier and newer with the Euros, particularly with the smoke/silver In.Pro blinkers I added to replace the amber ones.
Undoubtedly the best $500.00 I have spent on this car.