wrote in message
...
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.

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


eg your brain.



--
Adam