On Sat, 10 Jan 2009 20:33:19 -0500, wrote:

On Wed, 07 Jan 2009 09:31:18 -0600, Jimw wrote:

On Wed, 07 Jan 2009 07:21:47 -0600, Jim Redelfs
wrote:

A long time ago, SOME of us learned that constantly turning-on and
turning-off a lamp was usually more expensive than leaving it on. This
hasn't changed.


This is bull****. Turning on and off an incadescent light does not
use more energy, and if the off period is more than a few seconds,
energy will be saved.

Worse than that. AC incandescent lamps acturally turn on and off
60 times a second. :-)

It's 120 times a second (there's a zero-crossing after EACH
half-cycle), and power doesn't stay off very long. Probably not long
enough for the filament to cool and cause thermal stress.
--
Mark Lloyd
http://notstupid.laughingsquid.com

"The government of the United States is not, in
any sense, founded on the Christian religion."