sativa, what the hell are you talking about?
CFLs are produced in varying shades of white:
- "Warm white" or "Soft white" (2700 K - 3000 K) provides a light very similar to that of an incandescent bulb, somewhat yellow in appearance;
- "White", "Bright White", or "Medium White" (3500 K) bulbs produce a yellowish-white light, whiter than an incandescent bulb but still on the warm side;
- "Cool white" (4100 K) bulbs emit more of a pure white tone; and
- "Daylight" (5000 K - 6500 K) is slightly bluish-white.
The "K" denotes the correlated
color temperature in
kelvins. Color temperature is a
quantitative measure. The higher the number, the “cooler”, i.e., bluer, the shade. Color names associated with a particular color temperature are not standardized for modern CFLs and other triphosphor lamps like they were for the older style halophosphate fluorescent lamps. Variations and inconsistencies exist among manufacturers. For example, Sylvania's Daylight CFLs have a color temperature of 3500 K, while most other bulbs with a "daylight" label have color temperatures of at least 5000 K. Some vendors fail to include the kelvin value on the package, but this is beginning to improve now that the
ENERGY STAR Criteria for CFLs is expected to require such labeling in its 4.0 revision.
BTT