I have been reading your night commuting comments, so thanks.
The HIDs definitely put out more light (I have even tried H4 70W HIDs) but unless the lenses is designed for it there is light wastage as the beam pattern is not as defined. The light tends to scatter the higher you go in power. I don't really want to mess around with installing HIDs, as I want the Trophy to relatively standard where possible, if you can call an SE Trophy standard!
I am more interested in night time riding doing distances in the country, with the need to pick up kangaroos, emus, goats, cattle, camels, wombats etc etc while doing 100kph or more. So penetration and spread are the key. The higher efficiency bulbs supposed give more of both over standard bulbs, and from my experience do work. As the standard lights seem very good for a bike, some +50s should give more light and bulb life. I will give the standard bulbs a decent try first as they may well have more light than standard bulbs to start with.