hi brooksy,
when you use a dimmer BELOW about 80% the colour temp changes.
with incandescant globes (3200k) when you lower the voltage to the globe with a dimmer the filament does not burn as hot and the light it produces turns yellow/orange.
this is quite noticable with the eye/camera and can be counteracted by using varying thicknesses of 1/8, 1/4 ctb with the result of losing more light.
not sure of the colour temp figures but it is easily seen by eye.
i prefer to use nd's to lower the level below 80%.
if you need to lower the level below 80% you should use a lower wattage fixture. usually you would only need to dim the light a couple of stops and it is not an issue of getting below 80%.
hope this clears it up for you.
cheers,
darty
ps. i have several "lights that make everything look really good" but they are very fragile and only one is working at the moment................i keep them in my kit for the clients that think they want everything.............................you wouldnt believe how many people fall for this.....