Being called from across the house to be asked why all the lights are on in an empty room is a childhood experience many of ...

As the usage of incandescents dimmed, two new types of bulbs rose in popularity: LED (light—emitting diode) and CFL (compact fluorescent lamp). Both LEDs and CFLs are longer-lasting and use far ...

So he also took this opportunity to change the color temperature of the light in his room. Unfortunately it wasn’t as simple as just replacing the fluorescent with the LEDs — no, that would be ...