Thread: Interesting ...
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Arfa Daily Arfa Daily is offline
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Default Interesting ...




That also begs the question "Why did Arfa Daily post the article"? My
best guess(tm) here is that he's still having problems adjusting to
LED lighting and needs a new reason to not use LED lighting. Am I at
least close?


Not really ...

I don't like CFL lighting - that's well known. I am still reserving judgment
on LED lighting. My local supermarket recently had a major refit, and all of
their ceiling fluorescent fittings were replaced with linear LED arrays, so
at first, you don't notice that anything has changed. When I did realise, I
was surprised that the quality and intensity of the light in terms of how
well it illuminated the sales floor, was every bit as good as the original
fluorescents. They also have replaced the car park floodlights with LED
arrays, and these are crap compared to the metal halide fixtures that they
replaced. My hairdresser has replaced all of the mini spots in his ceiling
fixtures with equivalent LED bulbs. They produce a good amount of light, and
the colour is not bad, but they are unpleasantly bright to look at. They are
also not a very good shape and don't fit the fixtures terribly well. I'm not
a great fan of LED street lighting either, as I think it is harsh in
comparison to say LPS, and nothing like as effective at penetrating fog, as
it is polychromatic light. It also doesn't seem as good at producing 'even'
street lighting as LPS or even HPS is, if you can get past the yellow colour
of those types.

As everyone also knows, I am not a fan of substitute lighting technologies
brought in for eco-bollox reasons. CFLs are not as good as incandescents,
and never will be in terms of light quality, low temperature performance,
and start-up time. LEDs are better in all of those areas, but still have a
long way to go before I would consider them to be a replacement technology
for domestic incandescent bulbs, rather than the substitute which they
currently are. The 'eco' credentials for this lighting, as spouted by the
politicians and commentators, is always far too simplistic, and designed to
convince the great unwashed that they must be better because they consume so
much less energy. No account is taken of the energy budgets to make these
things in the first place, or to dispose of them (properly) when they fail.
The supermarket sales floor lights are a good example of what can be
achieved with commercial LED lighting. Where you are not trying to reproduce
sunlight - such as with airport runway and taxiway lighting - then they are,
without doubt, the best and most reliable technology for the job. There are
may LED traffic signals in the area where I live, and they seem to work
extremely well, so another area where LEDs are appropriate and good at the
job.

All of the above, we have discussed on these two groups over the years, as
the technology has changed and evolved. I merely thought that this article,
by someone who seems to be in a position to make valid comments on the
subject, had an interesting alternative view of the common wisdom that is
generally pushed. Simply that, Jeff. Hence the reason that I titled the post
"Interesting..." ...