Driver's side is whatever was fitted in Japan, Passenger's side is the Philips bulb. On the road it's not a huge difference, but definitely better.
I also had a play with reversing lights, since I wasn't happy with the standard 21W ones, and even less happy with the LED ones I bought. As an aside, the LED ones give out very little IR light, so don't help the reversing camera at night at all.
Passenger's side is a normal 21W fillament bulb. Driver's side is a modified standard bulb base with a 55W halogen bulb soldered in (Ok, bodged!
Much brighter, and gives out enough IR to keep the camera happy.
Right, back to cutting up plywood....






