Govt banning lightbulbs.... wot about halogens?

Really? That sucks ...

Well it's more complicated than stated. If the *distribution* or spread (+/-

FWIW, I would imagine the spread for filament bulbs to be wider as the filaments are fragile and they have to be transported so their lifetimes are likely to be less accurate.

It might be - can't tell without knowing the power factor. i.e. the maximum current may well be 140mA, but some of that is a result of the apparent power of the load (i.e. its VA rating) rather than its true power.

But they only cost 20p. I can write of this amount should I get a dud. I object to being expected to write of 5.99 on a dud[1].

tim

Well true, but I was merely making a point that the LD measure doesn't

That makes it 33.6va, the power factor must be low (which is likely for fluorescents),

It's almost useless. We don't know if half fail at 9500, and the other half at 30000 - or if half of them fail at 10 hours, and the other half at 10010. Or something else entirely. We want the mean, not the median.

BTW "LD50" is normally used for pesticides and such - it is a measure of the Lethal Dose for 50%.

Andy

Noticed just such items during a recent visit to a hospital out patients dept. The individual consulting rooms had a panel in the ceiling that certainly looked like a flat panel radiator. No other heat source was apparent. No fans!

is this the same LD=50 that's used with mascara'd rabbits and smoking beagles?

But it ISD NOT THE BULBS that are the problem. Its the energy USE.

TAX THE ENERGY (MORE) and let everyone make up their OWN minds.

Mmm.. The diesel argument, really....

It actually has nothing to do with rabbits or beagles, but yes. It's the dose of something that kills 50% of a population - hence Lethal Dose 50%, or LD50 for short;

Crumbs. No wonder that Russky looked so poorly...

Let's see, Each bulb save maybe 30W over a 10,000 hour life. If that.

Thats 300KWh, at best, which is at most about £30.

Probably 35% of that will be made up in a domestic situation by extra gas/oil burning.

So it's about £24 if you are lucky, More or less. Over ten years or so.

Turning your thermostat down one degree from say 189C to 18C and buying a pullover would save on average about 10% of your fuel bill ANNUALLY.

Probably at least £25/yr for most people.

In most peoples cases this far outweighs any bulb issues.

Working from home one day a fortnight would probably save another 5% of an annual mileage of say 8000, so 400 miles, about ten gallons of fuel or around £40. The lower congestion probably saves another 2% or so.

Its happening. Eco catastrophe.

Indeed. MegaDeath is what we need, and Nature will ensure we get it.

Do what my previous owners did, and take the light fittings as well.

Makes the room above pretty cosy tho.

Underfloor heating...;-)

Me 2.

The qualifications for being an engineer - a ruthless dedication to the truth since nature doesn't understand lies, and what we do has to work with Nature, is in direct opposition to what a politician needs in order to survive and prosper.

Its an extension of the Peter principle. Ths that can, do. Those that can't, teach, Those that can't teach, preach. And those that can't preach get elected.

Just for a moment i thought you meant

Andy

Aaah well, if you drive south through the BT in the early evening 'rush' hour you should expect the worst of all possible experiences. :)