Re: Slightly OT. Heat and a Bench Light ...

"Jeff Liebermann" <jeffl@[EMAIL PROTECTED]
> wrote in message 
news:udt274h76p8nc23of0jri4bcjutkla9mtn@[EMAIL PROTECTED]
> On Mon, 7 Jul 2008 01:28:51 +0100, "Arfa Daily"
> <arfa.daily@[EMAIL PROTECTED]
> wrote:
>
>
>>OK. The bulb does not claim to be a halogen type. It was sold as a 'bog
>>standard' light bulb. It looks like a standard light bulb. It is stamped

>>60
>>watts on the packet, and on the bulb itself.
>
> Does it have one of these labels?
>
<http://www.energysavingtrust.org.uk/energy_saving_products/other_energy_labels/the_eu_energy_label/>
> <http://www.thelightbulbshop.co.uk/EnergyLabels.htm>
> If so, what are the numbers?  We don't have anything similar in the US
> so it would helpful if you could supply the numbers for an "ordinary"
> light 60w bulb.  Note that halogen are in class "D" while ordinary
> bulbs are "E" or "F".
>
>>However, it
>>has one major difference in that instead of the glass envelope being the
>>size of a tennis ball, it's more like the size of a pool ball.
>
> Could I trouble you to measure the approximate diameters?  I want to
> calculate the relative surface areas.
>
> -- 
> Jeff Liebermann     jeffl@[EMAIL PROTECTED]
 things I do for science !! I just had to rootle thru' the workshop bin

to locate the bulb which caused all the trouble in the first place. It is 
clearly marked 60 watts, and has a CE approval also. I can't tell you what

the energy rating letter is, as I don't have any more on the shelf. I have

two other types from the same stable, and one of the boxes has an energy 
rating on it, and one doesn't, so I'll have to look next time I am in the 
store.

OK. On the diameters. Consider them for all practical purposes, to be a 
sphere. The old was 60mm almost exactly, and the new, 50mm almost exactly,

measured with an electronic calliper, so reasonably accurate figures.

Arfa