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Mr. Luddite

On 1/20/2014 10:28 PM, wrote:
On Mon, 20 Jan 2014 14:50:35 -0600, amdx wrote:

On 1/20/2014 2:32 PM, wrote:

the EPA calc is $7.23 a year to run it.
That is less than 60 cents a month.

Do you know what the EPA uses as the cost for aKwh?
How many hours per day do they use?
Mikek

I don't know and I didn't have much luck looking. I see a lot of
calculators but nothing about how they get the number they print on
the box.

Obviously if you are getting that cut rate power Harry gets the number
will be different than you get with the gold plated 45 cent California
power.

Cree claims an annual operating cost of $1.14 for their least efficient
LED bulb, based on running 3 hours a day. They don't say what the cost
of electricity is.

Assuming they are using a realistic rate that means it would cost under
$10 a year to leave it on 24/7.

Here's an impressive and recent article. Outdoor high pressure sodium
lighting at Munich Airport in Germany is being replaced with Cree LED
lighting.

"The airport expects the new flood lights featuring Cree LEDs to consume
at least 50 percent less energy than the previously-installed
high-pressure sodium lamps, which would result in yearly electricity
savings of 122,000 kilowatt-hours and approximately 70 tons of CO2 on
completion of phase one of the lighting overhaul."

There's a picture of the new lighting shown. They used the brilliant
white color temperature and the result is much better and more natural
lighting than the high pressure sodium lights they are replacing.

http://optics.org/news/5/1/21