Does light (like heat) seep and weaken? [more inside]
posted by Pennyblack on Feb 18, 2009 - 5 answers

Is Al right? Am I really saving the environment by switching to CF bulbs? [more inside]
posted by Pollomacho on Dec 22, 2007 - 46 answers

What, if any, is the relationship between bandwidth and power? [more inside]
posted by odinsdream on Nov 19, 2007 - 14 answers

Best replacement for light bulbs in apartment building halls and common areas? [more inside]
posted by RandlePatrickMcMurphy on Oct 19, 2007 - 9 answers