Posted By: joe90How efficient is the electric light bulb?

From what I have read (and correct me if I am wrong) the ineffiecient % of the electricity used running a bulb is wasted in heat!. So If I build a passivehous its not wasted?

Well not in winter. summer it is.

So for a new build can I use this as an argument with the planers and count the lighting load as part of the heat load calculations?

In my experience the planners don't give a hoot about this. They leave green issues to Building Control and they don't give a hoot as long as it meets the regs.

Posted By: marktimeTom, doesn't your brain fry when you re-read this?

Posted By: cloudy_thoughtssomething called Intentionality is used to explain that bit of doublethink

We greenies think we're so open-minded, seeing things that the more stupid, frightened or conservative 'others' don't 'get'. Then the next set of belief-system buffers appears, just a little bit further down the line - and how vigorously that limit is defended, just like the 'others' defend theirs, using every weapon, ridicule, rudeness, to keep their own world-view comfortably intact. Anything but actually engage, enquire further (though you did, almost, for a moment, cloudy_thoughts - thanks)

Posted By: James NortonDoesn't that mean that everything that isn't an homeopathic preparation is effectively an infinitely effective homeopathic remedy?

Probably, yes, though you can leave out the homeopathy - that was just an early, pragmatic, partial systematisation of a corner of something much bigger. Medical traditional practice, and modern medical science, become much more comfortable with this area, the further east you go, starting from Germany, Russia, to the far east. Only the Anglo-Saxon (UK, US) world remains terrified to look there.

And of course it's about far more than just medicine/health - it's a clue to how the universe actually works (do we really think that state-of-the art scientific theory and methodology is adequate, complete and finally immune to imminent paradigm-change?). It's taking common experience things like human intuition, intention, coincidence - the things that actually shape the course of events - and deeming these worthy of urgent scientific curiosity.

Anyone wanting to, even 'scientists', can read into the material and quickly find they can lay aside their knee-jerk quack-busting defenses.

My wish came true! Light bulbs to be measured in Lumens from September 2010 - thanks, CWatters for the link

Joe90:
"From what I have read (and correct me if I am wrong) the ineffiecient % of the electricity used running a bulb is wasted in heat!. So If I build a passivehous its not wasted?. So for a new build can I use this as an argument with the planers and count the lighting load as part of the heat load calculations? "

It's not wasted only if you think using resistance heaters is not wasteful.

That is also true for all buildings that are heated and it is why I object to them being called energy saving. ( I agree with your line )

I agree about outside lights, sheds garages etc.

In the summer lights are not on hopefully til late or very late evening so there is a much reduced problem and even then it isnt that warm in the evenings either.

But although the light bulb is "reduced energy usage" the house still needs the same ammount of energy to keep it warm ----- So where is the energy saving????

yes! all the energy he "saves" in the winter by using so called low energy lighting he will have to add via the electric heating - no saving.

small saving during the summer but then evenings are lighter so not much lighting use.

When adding in the additional cost of the low energy lights -- he is likely making a loss! as well as the environmental impacts to consider.