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7000K, or 7000 Kelvins, is a temperature: 12140°F. Your bulbs emit light that looks somewhat like an incandescent black body at 12140°F. Lower temperatures are more orange, hotter ones are more blue.
Color temperature has nothing to do with the amount of light emitted. That is measured in Lumens, and a 55W halogen headlamp gives off 700-1500Lm depending on what you have.
Incandescent bulbs have never been an option for me. Sure, they're cheap to buy, but they're many times more expensive to run, plus they burn out ten times as fast as regular bulbs. Incandescent bulbs should be taxed into Hell ($2/bulb would be fine) so that slow-to-adopt consumers, and people who stubbornly fail to understand that fluorescents are cheaper, will finally switch.
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