Filaments in [incandescent] electric lamps are not as hot as the surface of the sun, yet the light they emit is very similar. Each one emits light in the entire wavelength range visible to the human eye . . . .
Incandescent lamps are notoriously inefficient, emitting less than 10% of the input power as visible light. The problem with more efficient sources like fluorescent lamps is that their light is not a continuous spectrum, but rather a handful of individual wavelengths. The effect is to distort colors of objects illuminated by the light.
Note that this “inefficiency” of incandescent light bulbs is the source of their scorn by the environmentalist left and their effective ban by the federal government. Energy Secretary Steven Chu reveals the mentality behind the ban when he says, smugly, of a law preventing individuals from buying the light bulbs they want: “We are taking away a choice that continues to let people waste their own money.”
What is Chu ignoring when he calls the choice to buy regular bulbs a “waste”?
Well, for one thing, he’s ignoring the fact that while incandescent light bulbs are not efficient in the sense of producing as much light per unit of energy as possible, they are incredibly efficient in the sense of producing the most desirable light for our money (including our energy). There is a rarely-consulted passage of a rarely-consulted document that champions “the pursuit of happiness.” When I choose to buy an incandescent light bulb, I do so because that gets me the best light for my money—with “best” emphatically including the quality of illumination I will enjoy as I read books, talk to friends, work in the evening, etc. To our government, such considerations are irrelevant; as long as I can fit neatly into government statistics that say I’m emitting less CO2 but I’m still alive and have access to illumination, why should it matter whether I enjoy my life more or less?
The ultimate standard of efficiency (be it energy efficiency, economic efficiency, or any other form) is the individual’s life and happiness. If anyone ever tells you that something you love is “inefficient,” and the cure is to shove something you hate down your throat, then “efficiency” has become a mere rationalization for tyranny.