On Sun, 15 Jul 2012 08:17:12 +0100, polygonum wrote:

We have spent considerable effort in sourcing ones which are acceptable
to
us. They are much whiter than standard "tungsten filament replacement"
ones but are not that horrible blue-ish colour of many higher colour
temperature lamps.

What's the make/model and source, please? I'd be interested in those.

Hmmm. They are described as being Photo lamps -

4 DAYLIGHT BULBS 5000k, Trumpet Top,Photo,Craft€‹s,20w BC

obtained from:

http://stores.ebay.co.uk/UKRMART

Not cheap... :-(

Ouch - almost as much as good LEDs!

Thanks for the link. I like the 'trumpet' shape as it exposes a bit more of
the tube so the output should be more than a straight spiral.
--
Peter.
The gods will stay away
whilst religions hold sway