On 1/20/14, 4:40 PM, amdx wrote:
On 1/20/2014 3:18 PM, F.O.A.D. wrote:
On 1/20/14, 4:14 PM, Hank wrote:
On 1/20/2014 3:40 PM, amdx wrote:
On 1/20/2014 2:17 PM, Hank wrote:
On 1/20/2014 1:09 PM, amdx wrote:

I think your numbers are slightly exaggerated, but not a lot.
Payback
should certainly be less than one your for most people.

I don't know how you arrived at this number but I'm in agreement with
your conclusion

Math.

Where did I lose you.

I used the cost of a kWh as 13 cents.
I assumed the new bulbs use about 10% as much energy as the old style.
If you saved $50, you must have spend $55 before and $5 now.
Mikek

Awesome.


All this higher math...I need to find my college abacus.

You're not that old, you probably had a TI-30.
http://en.wikipedia.org/wiki/TI-30 Note the Red LEDs.
Mikek


I believe the HP-30 and most other scientific calculators appeared after
I had received my M.A. We had a couple of clunky desktop calcs in the
math labs and our trusty K&E sliderules. In those days, you actually had
to know how to do the math, not that I was ever a whiz at math, but I
did ok.