I'm curious. "Low energy" bulbs are very much in the news - but how much
extra energy is expended in their manufacture compared to a standard
incandescent? I assume it's more - so is there a real net /overall/ saving over the bulb life? If so, how much?
Not in the least - I've started replacing them as they go, including the
6x60W R60 spots in the kitchen: the 15W non-spot replacements seem to
light the place just as well. Shame about the dimmers in other rooms
though: are there dimmable low-power lights around?
I really did want to know about the energy economics, as these are being
pushed as "CO2-friendly". It's obviously not a direct relation to
running power. Someone, somewhere, surely has done the sums. Or not??
In an earlier contribution to this discussion,
Even if he is, it's a very valid question - and one that seems to be ignored
by the government when thrusting these token green measures on us. Just as
your average suburban domestic windmill will take more energy to manufacture
it than it will ever generate in its lifetime.
I've not yet found a low energy light bulb which comes anywhere near the
claimed tungsten equivalent for light output.
Roger Mills says...
Ditto. I've been disappointed with low energy bulbs. They
don't seem to last any longer than ordinary filament bulbs
and the equivalent light output claimed is just plain
wrong. So where a good light level is wanted such as the
main living room and bathroom I've switched back to
ordinary bulbs. It's nice to be able to see again!!!
Perhaps its time to start stocking up on 100 watt filament
Blimey, if it's not a "New Ice Age" it's "Global Warming" we've got
used to that, but we never expected "The Dark Ages" to come back.
I cannot believe you are criticising him for simply asking for help in
obtaining the knowledge he needs to make an informed choice.
If you do not have this information that's OK. No need to be
Presumably you made your choice on a different basis. One that did not
require you to be be in possession of the facts. That's also OK.
Others prefer to make decisions from a position of being better
informed. This is OK as well.
If this position is anathema to you I suggest you do not read or
respond to their postings.
It's hard to say because their introduction has been heavily
politicised, and personally I suspect corruption at high level in the
EU and for all i know the UK.
CFL's from China have been subject to an import levy for some years,
whilst GE has been subsidising their sale.
Philips who's "GloeilampenFabrieken" were losing money shut their GLS
factory down and have been lobbying the EU with some success to get
GLS lamps banned in the EU so that all their competitors will also
have to shut and they will be able to sell Chinese CFL's without
competition from any GLS lamps.
So much for free trade USW, USW, USW ...
As for how much energy goes into making a Chinese CFL. It's probably
easiest to say it's hasn't been published.
Energy in China produced from burning soft brown coal in power
stations built and staffed by people on slave labour pay will always
be much cheaper than ours, so price is not any indication either.
What one can say is that without doubt soft brown coal is one of *the
worst* fuels to burn from the point of view of the environmnent.
I bought a few similar ones ones for research purposes, to see if they
were suitable for viewing mammography films. They weren't.
The one's I got were "daylight" and probably made for "Growing
vegetation in an environment sealed from daylight" IYSWIM.
They probably did give the light output promised (when new at least)
but the size/shape/geometry was unworkable for a domestic application.
Still maybe they are getting there.
When they can actually do it, *then* they should talk about it. :-)
(Quote from my Belgian boss).
Well you could try asking someone who's got one. The trouble is there
is nowhere near enough wind in most urban/suburban settings. It's a
bit old hat - even the most credulous innumerate greenies now accept
they don't work where there are trees and buildings.
?hl=en&q=wind+turbine+payback+carbon&btnG=Search&meta=If you are by the coast, or on top of a hill, it may be a different.
In message , Clive George
Consider also bulbs with a different temperature colour the 'dull' low
energy bulbs are all around 2700K colour temperature. I've fitted some
6500K bulbs - the light is much whiter.