Many people are now familiar with the idea of a "warm" white or a "cool" white being offered by fluorescent and other light bulbs. These bulbs have vastly different color temperatures. The "warm" bulb often has a color temperature of 3,000K and casts a more orange/red light on objects. Because you normally associate warmth with red or orange objects, this accounts for the "warm" descriptive name, even though it is a cooler (lower) temperature on the Kelvin scale. A "cool" white bulb commonly has a color temperature of 4,100K and higher on the Kelvin scale. This is in the low range of blue color, similar to ice, therefore earning the "cool" description.
Color Temperature Considerations
So with choices now in lighting color temperatures, the questions that often arise are: "How do I know what color temperature I should choose? Should I have a certain color temperature in my warehouse, a particular color temperature in my offices, and then a specific color temperature in my lobby?" In some cases the answer may be the same color temperature for all of those applications, or it could indeed be different for each depending on the desired and/or required effect.
A flame, for instance has low color temperature (around 2000K), and looks yellowish and warm, while daylight is around 6000K (as is a daylight fluorescent light) and looks rather bluish. So a general suggestion for 'invitingness' would be rather warmish color temperature (and definitely uniform color temperature of lights in a room) and lighting design that allows for brighter areas separated by shade.