I just bought these today from amazon.
https://www.amazon.com/Porsche-Bulb-Halogen-Headlight-HELLA/dp/B009GJ74VY/ref=sr_1_3?ie=UTF8&qid=1482980115&sr=8-3&keywords=Porsche+968+Bulb+55%2F60wWas Hella for $8.50 for a pair and free shipping. Will not know until riding season again, and I have the bike on the road.
I wanted better light, but didn't want to go for those 100/80W bulbs. Going from 80W total, to about 40% more at 115W. I also have a modulator in my NTM bike, but haven't figured if it's working or how to turn it on. Will know more after I open the fairing.
The Smart Switch is another option, if I want more power after trying the higher wattage bulbs. I don't do much night ridding, just want some more to be seen.