If you've not already done it, I can recommend fitting an H7 HID kit to improve the OE headlamp.
You aren't contravening any C&U regs as the lens is clear and it's the reflector that focuses the beam.
Very easy to fit, I used one like this- clicky and made sure it was 6000k as that's as close to white as you'll get.
There's several threads on here about how to fit but short version is you use the spade connectors from the OE loom for the kit, and cut a small hole in the rubber boot over the bulb. Bit of silicon around the grommet and it's all good.
I mounted the ballast with double sided sticky tape in the tank/fork alcove.