On May 19, 12:36*am, terry wrote:
On May 18, 3:16*pm, Glenda Copeland gscopel...@Use-Author-Supplied-

Address.invalid wrote:
On Tue, 18 May 2010 06:17:06 -0700 (PDT), keith wrote:
It's likely either an NE2 or an NE2H, which a quick web search shows
are rated for .03W and .09W, respectively. *The right answer is
"fagetabooutit".

Using 0.1W, and averaging my electric rates (35¢/KW) for a dozen switches I
get about 25¢/month or $3.00/year.

Ok on all those numbers but the spec I found showed each neon
indicator using about 0.04 watts per hour.

Just a nitpick, but .04 watts per hour is meaningless. It's .04 watt-
hours per hour, or just .04 watts. One watt for one hour is defined
to be one watt-hour.

Based on 0.3 milliamps at 115 volts. Thus wattage = current times
voltage or (0.3 x 115)/1000 = 0.0345 watts per hour.

No, it's .04 watts (if that's the number). You can't do some
arithmetic, throwing away precision, and then come back to the same
units with a different number. In this case you lost energy. At
least you could have made a perpetual motion machine. ;-)

Per month that would be 24 x30 x 0.0345 = 24.84 watt/hours.

And at ten cents per 1000 watt hours (i.e. per kilowatt/hour) that'd
cost 24.84/1000 x $0.1 = approx 0.25 cents
At 35 cents per kilowatt hour it would be 0.75 cents, per month.
And for a dozen switches 0.75 x 12 = about 3 cents or of the order of
36 cents per year.
Since we are all presuming, it seems, that the indicator light inside
the switches will be off whenever whatever the switch controls is 'on'
the indicators will cost even less than that. In other words if one is
using electric lights, negligible!

If one is using other appliances, such as refrigerators, water
heaters, or clothes dryers, the lights themselves are (usually)
negligible (if not, the whole bill is ;-).