> I understand from a photographic POV, but the occasional deviant will ask,
> what about the perspective of the listener/watcher? Any major advantages or
> disadvantages?
Oh, MAJOR advantages.
1. Power consumption requirements for LED lighting is a fraction of
other types. Heat generation from the fixtures themselves.
2. For the performers on stage, it is MUCH cooler because you don't
get the infrared heating from the lights. Most traditional ellipsoidal
stage lights use reflectors that pass IR out the back of the fixture
instead of reflecting it towards the stage. But not entirely. The IR
transparent mirrors help a lot, but aren't perfect. It's a beast when
you have some par cans with non-transparent reflector bulbs as those
will absolutely cook you.
3. Dimming flexibility and color temperature. As you dim a traditional
bulb, it will change colorcast and go more orange. LED lights keep the
same color temperature regardless of brightness. Dimmed to minimum,
they maintain color purity.
4. Instant on/off. No fade up, fade down time or need to "pre warm"
the bulb for quick response. This gives programming flexibility and
the ability to create sequences that require flickering or flashing or
laser-like effects.
5. Color changes. This depends on the specific lighting instrument,
but with multi-color LED lights, you've got the entire RGB spectrum
available to you instantly, without needing to rotate filters or
dichros as with standard metal-halide lamps.
6. Features scale with money spent. Up to 16 DMX channels of control,
for every LED color source, focus, motion, rotation, etc., etc.... I
can deploy "intelligent lights" for under $500 a piece, instead of
$6000 a piece. Most concert grids use intelligent lights for the
majority of the lights now because they are not only affordable, but
give extreme flexibility.
Disadvantages:
1. Color issues for photography. This is a major problem, but is
actually addressable by not going with pure colors, but keeping a
little bit of a blend going.
2. It takes fewer lights to achieve a measured brightness, but more
lights to achieve an even light. For example, I can use a pair of
ellipsoidal lights to comfortably light a podium and have the person
look great. But to achieve the same "quality of light", I need four
LED fixtures. This is changing, though, because there are now LED
lights that are designed to directly mimic an ellipsoidal or follow
spot. These are better, but not quite there and they don't use
multi-color LEDs, but are wide-band white. I like the way an
ellipsoidal projects light onto the subject compared to multi-color
LEDs.
AG Schnozz
--
_________________________________________________________________
Options: http://lists.thomasclausen.net/mailman/listinfo/olympus
Archives: http://lists.thomasclausen.net/mailman/private/olympus/
Themed Olympus Photo Exhibition: http://www.tope.nl/
|