Energy saving lightbulb question

[Halloween Jack]

Hi folks,

My wife and son just bought a new lamp shade for his room, it has a 60W max.

I thought I'd have to buy a new 60W equivelent energy saving dimmable to replace his 100W equivelent energy saving dimmable. But it dawned on me it's a heat thing isn't it? I mean his bulb isn't 100W anyway. It's a lot less.

So I guess what I'm trying to say is that if a shade says 60W max it means that, not 60W equivelent max.

Is this right?

 

[holmslaw]

..

 

[bernardgreen]

In theory an energy saving lamp that produces light equivalent to a 60 watt incandescent will generate a lot less heat than a 60 watt incandescent lamp so would be perfectly safe ( heat wise ) to use in a fitting with a 60 watt maximum.

In practice it doesn't always work.

The 60 watts of incandescent heat is produced at the filament and therefor not concentrated by the lamp holder. Much of it is dissapated to air by the hot glass bulb and thermal radiation.

The heat produced by the ballast of the energy saving lamp is concentrated in the electronic module close to the lamp holder.

The 9 watt (~45 watt) lamp in front of me has ventilation slots around the bayonet cap which suggests that [1] the electronics need air flow to cool and [2] when hung with cap at top the heat will go straight to the lamp holder. And this is a good quality lamp. !

 

[Halloween Jack]

Thanks guys.

Well, I've just found out my 100W equivelent is actually 72W so not as low as I'd hoped.

But I have now found a more expensive 20W (equivelent 100W) so I've bought that. It is supposed to be dimmable.

fingers crossed.

Thanks anyway

 

[Taylortwocities]

Don't worry about the watts thing, that is soon to go away.

Our European masters have dictated that lamps are to be rated in Lumens, not Watts. So that should prevent any confusion

 

[ccam108]

Don't worry about the watts thing, that is soon to go away.

Our European masters have dictated that lamps are to be rated in Lumens, not Watts. So that should prevent any confusion

About bleeding time.

No more crazy equivalent figures then?

Colin C

 

[ban-all-sheds]

No - just a continuation of the craziness which says you may lamps like these:

but not like these:

because the former have a higher lm/w, and therefore if we encourage people to use them to light up their rooms we'll reduce carbon emissions.