Re: LED lamp instead of flash?

Paul Furman <pa...@xxxxxxxxxxxxx> wrote:

I dunno why simple data like that cannot be provided.

Probably because the makers know that anyone who needed
and understood that data would be horrified by the specs.
That, or the maker doesn't want to be tied to a specific
profile, because they are sourcing the LEDs from various
places, and the output changes during battery life, and as
the phosphors age, etc.

Low-end white light LEDs are using phophors to
transform the output of the emitter LEDs, Based on what
I see on wiki, it's a messy spectrum, often blue-heavy.

I'd expect a serious photo light to use discrete R-G-B
LEDs, and be tunable for color temp and spectrum,
maybe even with a flip down filter to mimic fluorescent's
choppy spectrum.

No color temp? No CRI? No spectrum plot? Not even
a mention of how "white" is generated? No sale,
unless the light itself is all that's needed, where a
custom WB covers it.

In my own color-critical work, I've learned to carefully
limit the lighting to a single source type, as it's way too
much work to deal with correcting scene elements lit
only by a subset of the sources, esp. shadows.

Do these "5600K" "daylight balanced" LED lights really
mix well with actual daylight?

--
Regards, Bob Niland mailto:name@xxxxxxxxxxx
http://www.access-one.com/rjn email4rjn AT yahoo DOT com
NOT speaking for any employer, client or Internet Service Provider.
.

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