On Sep 19, 7:14 am, "Telstra" <tfwil...@paradise.net.nz> wrote:
> Power saver bulbs not only use 80% less power for
> the same light output but last for up to eight years
>
>
One brand package here says that an equivalent to 65 watt CFL bulb
uses 15 watts.
15/65 = 0.23 or 23% so the 'saving' is 100 - 23 = 77%, pretty close to
80% as stated.
But, in this moderate climate, that 'wasted' heat would contribute to
heating the house, in place of the electric heat cutting in! Lighting
is mainly used in the evenings and at night, especially as the cooler
evenings 'draw in' (shorten). Which is when it is cooler and heating
is required.
So still haven't convinced our selves there is any savings yet. from
using a $2 to $3 CFL in place of a 25 cent incandescent that uses four
times the amount of electricity when it is on. Our one experiment with
a 'cheapy' CFL outside, which tends to be on all night, over the front
door, during the winter was not a success! It looks like a more
expensive CFL is required for temps. below freezing? May try one when
the existing 5000 hour long life bulb which has been there for the
last five years or so burns out.
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