Tim Mitchell wrote:
In article , Ian
Stirling writes
Tim Mitchell wrote:
In article , Howard
writes
mrcheerful . wrote:
"Howard" wrote in message
r.co.uk...

Advice required re LED's.

I find led light tiring.
I would use halogen lighting as its colour is like daylight.

This is useful information.

I learn I need as full a spectrum as possible, tired eyes I do not
want.

You don't get full spectrum with white LEDs. They are basically blue
LEDs with a fluorescent material to produce the white light. There are
lots of holes in the output spectrum.

There exist 'warm white' LEDs, which don't do this.

really, what manufacturer?

I thought that LEDs by their nature only produce a narrow spectrum of
light.

They do.
It's just that some come with a fluorescant material with a wider spectrum.
Luxeon "Warm White" LEDs.
LEDs and fluorescants are basically similar - one uses blue, the other
uses UV to excite a mix of phosphor.
It's just that with the LED, the basic colour can be used as part of the light,
if desired.