In every instance the lighting was terrible. I really haven't yet found an energy efficient bulb that didn't make my place look like a jail cell.
My current place has halogen track lighting and I really like it.
The vocabulary is a bit weird, since "warm white" corresponds to "low color temperature". It's because we mentally associate blue with cold/ice and orange with fire, but the color temperature scales are based on the color an object glows as you heat it. To make a black body glow blue you have to heat it pretty damn hot.
In architectural lighting, the reference spectrum depends on color temperature. Warm whites are measured against the black body spectrum, cool whites are measured against the daylight spectrum.
That's done because it's very unusual to get a black body radiator that hot on Earth, so if you're talking about something on the cool white end odds are high it's daylight or trying to approximate it, not a tungsten filament or a campfire.
http://go/wiki/Color_temperature#Categorizing_different_ligh...