I use to run the PIAA platinum super white 80/80s, but last time one of them burned out I couldn't find any replacements. I was told by several sources that the 80/80s were discontinued and PIAA was only selling 60/55W bulbs in the US. I switched to the 60/55W 4150K xtreme white bulbs (PN 15260).

The xtremes are bluer than the super whites and not quite as bright.

I highly endorse the PIAA lights and lamps, which ever ones you choose, been using them for over 12 years now. They're a little pricey, but well worth it!