(U: BTW, the section of this article that deals with prisons is worth the price of admission, but I'll focus on something else...)

] 4. Incandescent Light Bulbs
]
] In reality, these sad devices are heat bulbs.
] Supposedly a lighting technology, they produce nine times
] more raw heat than they do illumination. The light they
] do give, admittedly, is still prettier than the eerie
] glow of compact fluorescents and light-emitting diodes.
] But it's still a far cry from the glories of natural
] daylight.
]
] Plus there's the cost of light bulbs, their
] fragility, the replacement overhead, the vast waste of
] energy, glass, and tungsten, the goofy hassle of running
] air conditioners to do battle with the blazing heat of
] all these round little glass stoves let's face
] it, these gizmos deserve to vanish.
]
] They will be replaced by a superior technology, something
] cheap, cool, and precisely engineered, that emits visible
] wavelengths genuinely suited to a consumer's human
] eyeball. Our descendants will stare at those
] vacuum-shrouded wires as if they were whale-oil lanterns.

So, they are slowly replacing traffic lights with LED lights in atlanta. If LEDs are bright enough for this purpose, one must imagine that you could create a suitable light bulb replacement that:

A. Screws into a socket.
B. Essentially consists of a stick covered in white leds.
C. Has a translucent plastic filter covering it which only emits "lightbulb" wavelengths.

Why is this hard?

(U: Maybe the power transformer you'll need to convert your whopping 120 volts of AC power into 5VDC will create just as much waste heat as your lights did. As almost every device in your house now has an AC to DC power converter, maybe it makes sense to start talking about putting a centralized AC to DC converter in your house and running two circuits, an AC cicuit for major appliances, and a DC circuit for basically everything else. It would reduce a lot of costs, and improve the safety of most home wiring. Of course, cutting over to something like this would be a huge effort that would require widespread coordination from several industries. (For those of you who aren't electronics savvy, basically what I'm saying is that your house ought to have the "power supply" rather then your computer.)

Ten Technologies That Deserve to Die