On 03/10/2015 14:33, wrote:
On Saturday, 3 October 2015 11:24:59 UTC+1, ARW wrote:
nt:
...
On Friday, 2 October 2015 18:36:58 UTC+1, wrote:

High pressure mercury vapour lamps were a common replacement in street
lighting gas lanterns.

but are now obsolete,

Funny that. I swapped one last week and had no problems in buying one.

Name any application in which they have an advantage over HID or sodium. There are none.

Any application which currently uses them, and you need to replace the lamp!

I have plenty of things at home with obsolete technology in.

Don't you mean obsolescent? ;-)


--
Cheers,

John.

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