Re: #1. Many years ago I attended a performance of "Pump Boys & Dinettes"
at a local theater. During the performance one of the players threw his
cowboy hat into the air which hung up on an overhead stage light.
Performance continued twenty minutes until the hat burst into flames. Made
for an interesting unplanned intermission.
Charlie
On Fri, Nov 18, 2016 at 2:20 PM, Ken Norton <ken@xxxxxxxxxxx> wrote:
> > 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
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