"Graham." wrote in message
...
On Sat, 14 Jul 2012 15:05:01 +0100, "Mr Pounder"
wrote:


"Arfa Daily" wrote in message
...


"Brian Gaff" wrote in message
...
Why is it that when one wants cfls, one is forced to have the weird
light
output that many find hazy and hard to see in? I'd have thought that
the
really white phosphoreds would add very little to the cost and be much
better for lighting purposes, or is the cream/green/yellow fuzzy one
very much more efficient or something?
It even makes my eyes feel tired even though I cannot see in it.

Brian

--
--
From the sofa of Brian Gaff -

Blind user, so no pictures please!


I really don't know what it is about CFLs over linear flourescents. I
have
absolutely no problem whatsoever seeing under incandescents or linears
of
any colour persuasion, neither do I find their light objectionable in
any
way. However, I hate the sickly light that CFLs generate, and have great
trouble reading under them. None of them of any colour temperature or
CRI
seem to suit me. About the only thing that I can say is that they use a
tricolour phosphor mix, and this produces a highly discontinuous
spectrum
compared to daylight or incandescent light, but then the spectrum from
linear flourescents isn't very clever, either.

Lots of people will now jump on the thread and say that they can't see
anything at all wrong with CFLs, and that the light from them is perfect
etc etc. Maybe this is true for them, and I'm sure most people, but it
is
not for me, and apparently Brian. I do have a degree of colour
blindness,
and maybe it's this, combined with the 'holey' spectrum, that combines
to
make their light objectionable to me.

On a more practical level, I tried putting one in my bench light a while
back. Unfortunately, it was worse than useless for what I do (electronic
service work), as the discontinuous spectrum played havoc with being
able
to correctly identify resistor colour code bands. Orange was barely
distinguishable from brown and sometimes red, and blue, green and grey
were also a problem with some resistor types. I have no such problems
working under incandescent light.

Arfa

What do they use in Asda etc? I don't last long in these places before my
eyes start to smart.



I think Asda use dimming high frequency ballasts with linier tubes,
and they do dim them when the night shift is working when the store is
closed.

They may even dim automatically depending on the amount of natural
light they get through the skylights, you would be hard pressed to
notice this if they do.

They also use LED lights strung low over fruit & veg.


--
Graham.
%Profound_observation%

Taa. I could not work in a place with lights like that.