Stircrazy and other lighting gurus

[marie]

They are not electronic ballasts. I decided to go with the xm bulbs because first off they are cheaper and second, according to sanjay they are a bit whiter then the ushios.

So in your opinion Steve, how often should I be changing the bulbs. Are they being overdriven to the point where the bulbs need to be changed more often then every 12 months?