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Confused yet? But wait, there's more...
The light bulb labels also include information about "light appearance" which ranges from "warm" to "cool" listed as "K"; For example: a bulb might be listed as "2700k" on the scale. The "K" means the "temperature" of the bulb on the "Kelvin" scale. "Warm" on the Kelvin scale means the bulb gives off a more yellowish color, while "cool" on the Kelvin scale means the bulb gives off a more bluish color.
Choosing Light Appearance
According to the experts, if you are looking for a light bulb for the kitchen or laundry room, you would choose a "cool" bulb in the 4000k range. "Cool" light bulbs are better in areas where you will be doing some sort of task.
If you are looking for a light bulb to use in the living room, or a bedroom, you should choose a "warmer" bulb in the 2700k-3000k range. "Warm" light bulbs are better for areas where you relax!
Someday We Will Get Used To The New Light Bulbs...
and someday, if we mention 100 Watt light bulbs to the younger generation, they will look at us with the same confused look we get now when we mention "8-Track Tape Player."