Help, Advice, Owners' Discussion and DIY Tutorials devoted to the second generation C70, S40 and V50 Volvos -- awkwardly model year 2004 ½ onwards -- plus where to go for advice and discussion on Volvo's sporty C30 Coupe powered by Volvo's ubiquitous inline 5-cylinder power plant.
First I would check headlight aiming. The light cut-off is very sharp on these cars, and if they're aimed too low, it can be easy to outdrive the lights.
OTOH, there is a lot of activity around aftermarket HID. It is not, however, a trivial mod. The cars use PWM to preserve the halogen bulbs, and the pulses mess up the HID ballasts.