"Marc Levenson" wrote in message ...
IceCap ballasts will overdrive them from 40w to 110w each, but it
will shorten their useable lifespan. In six months, their usefullness
is over. But that is okay!! It's time to replace them anyway.

I do not understand the reasoning here... If you have to change bulbs
every 6 months in their nominal working conditions, and overdriving
is shortening their life significantly, then when you overdrive you need to
replace them much more often to prevent color shifting and algae blums.
What am I missing in this picture?