On technolgical improvements in lighting

Two out of three light bulbs burned out in our new lamp, so off to the store we went. We wound up with two different bulbs: an LED ($9), and a compact fluorescent ($7). This lamp has 1 incandescent bulb, 1 CFL, and 1 LED; would anyone care to guess which is which?


Wikipedia's entry on LEDs has an enlightening explanation of the temperature of such white LEDs; the phosphor that converts the LED's blue light into white light doesn't do a very good job of it, and much of the blue leaks out -- this graph captures the effect nicely.