"Jim Adney" <jadney@[EMAIL PROTECTED]
> wrote in message
news:10s274h3qb1ssdblm2ssc85gvr3e86r9i9@[EMAIL PROTECTED]
> On Mon, 7 Jul 2008 01:28:51 +0100 "Arfa Daily"
> <arfa.daily@[EMAIL PROTECTED]
> wrote:
>
>>So, if we believe the rating stamped on both the bulb itself, and its
box,
>>and you are prepared to believe me when I tell you that with this bulb
>>fitted, the temperature of the shade was a whole heap hotter, then
>>somewhere, there must be another explanation than the two that you
believe
>>are the only possibilities.
>
> I believe everything you've told us about the bulbs. I have no reason
> not to, but 60 Watts is still just 60 Watts.
>
> There's no way to get more heat out of it than that. So either the old
> 60 was actually less than 60 or the new 60 is more than 60 (or both.)
> Or you're mistaken about the new ones running hotter, which I agree is
> the less likely option.
Presumably though, temperature will rise, both at the glass surface and
the
surrounding air, if that heat is not being radiated away as quickly as
with
the older design ?
>
> One other possibility occurred to me, and that is that your socket
> chose this moment to become resistive, which could have raised the
> total power above 60 Watts and concentrated that extra power
> dissipation in the socket - consistent with your observations. I'm not
> familiar with the socket you describe, so maybe you can judge the
> likelyhood of this. I suspect that if this had happened, the light
> output would have been affected and you would have noticed.
>
> -
> -----------------------------------------------
> Jim Adney jadney@[EMAIL PROTECTED]
> Madison, WI 53711 USA
> -----------------------------------------------
Plus I did say earlier that the socket was replaced fairly recently, and
is
working just fine again now without one of those bulbs in it.
Here is a picture of the actual item so you will now know for ever, what a
UK bayonet cap looks like !
http://www.comparestoreprices.co.uk/images/b&/b&q-40w-bayonet-cap-lightbulb-glass-pearl-pack-of-4.jpg
and here's one on a CFL. which shows the connection pads very clearly.
http://upload.wikimedia.org/wikipedia/commons/b/bc/Lightbulb-Bayonet-Cap.jpg
The B&Q bulb got hot enough to fry that black resin stuff, and completely
destroy one of the connector pads which are made from (lead-free now, I
guess) solder.
Arfa
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