Artificial lighting systems are transitioning from incandescent to compact fluorescent lamp (CFL) and light-emitting diode (LED) bulbs in response to the U.S. Energy Independence and Security Act and ...

That offers a couple of key benefits. Firstly, they probably won't be noticed by bad actors (seriously, how often do you look up at a room's ceiling light fittings?) Secondly, they'll plug into a ...

Turn an old CD into a spectroscope to analyze light—you may be surprised by what you see. Try pointing your CD spectroscope at the fluorescent light in your room, sunlit clouds in the sky, even your ...