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Upgrading lighting systems
http://www.ballet-dance.com/forum/viewtopic.php?f=8&t=9374
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Author:  Stuart Sweeney [ Thu Aug 12, 2004 11:38 pm ]
Post subject:  Upgrading lighting systems

Brief report about a lighting system upgrade in the UK:

Light fantastic
From The Stage

The Congress Theatre in Cwmbran, Gwent has benefited from a £30,000 lighting refurbishment project managed by Stagecraft. The upgrade features two of Selecon's new Pacific followspots, which are said to be among the first installed in the UK.

click for more

Author:  salzberg [ Sat Aug 14, 2004 5:11 am ]
Post subject:  Re: Upgrading lighting systems

Selecon makes very good equipment. The only problem is that they're from New Zealand, which is south of the equator; the light comes out upside down and backward.

Author:  Stuart Sweeney [ Sat Aug 14, 2004 9:09 am ]
Post subject:  Re: Upgrading lighting systems

Quote:
...from New Zealand, which is south of the equator; the light comes out upside down and backward.
Gee whiz, I never knew that Salzberg. It's amazing what you can learn on CriticalDance.

<small>[ 14 August 2004, 11:10 AM: Message edited by: Stuart Sweeney ]</small>

Author:  salzberg [ Sun Aug 15, 2004 4:09 am ]
Post subject:  Re: Upgrading lighting systems

Color mixing works backwards, too. In the northern hemisphere, we make magenta light by mixing blue and red; down under, they make it by mixing red and blue.

Author:  Stuart Sweeney [ Sun Aug 15, 2004 5:43 am ]
Post subject:  Re: Upgrading lighting systems

Gosh! Who would have thought that the mixing of paint was non-commutative. You know everything Salzberg.

<small>[ 15 August 2004, 07:43 AM: Message edited by: Stuart Sweeney ]</small>

Author:  salzberg [ Sun Aug 15, 2004 6:36 am ]
Post subject:  Re: Upgrading lighting systems

Light, Stuart, not paint.

Mixing light is additive, whereas mixing paint is subtractive. This is why they have different primary colors.

The primary colors of paint (more accurately, "the primary colors of subtractive mixing") are:

<font color = red>Red</font>
<font color = blue>Blue</font>
<font color = C0C000>Yellow</font>


The primary colors of light (more accurately, "the primary colors of additive mixing") are:

<font color = red>Red</font>
<font color = blue>Blue</font>
<font color = green>Green</font>


How, you may ask, does one get <font color = C0C000>yellow</font> light out of <font color = red>red</font>, <font color = green>green</font>, and <font color = blue>blue</font>?

It's a secret.

<small>[ 15 August 2004, 09:43 AM: Message edited by: salzberg ]</small>

Author:  djb [ Sun Aug 15, 2004 4:25 pm ]
Post subject:  Re: Upgrading lighting systems

Thanks for the provocative question, Jeff. I looked it up and learned something new. Now, what was the topic of this thread?

Author:  salzberg [ Mon Aug 16, 2004 8:19 am ]
Post subject:  Re: Upgrading lighting systems

Shhh, djb! Don't tell anyone the answer; I win lots of beers with that bet.

Author:  BabsLights [ Wed Aug 25, 2004 2:57 pm ]
Post subject:  Re: Upgrading lighting systems

Quote:
Originally posted by salzberg:
Don't tell anyone the answer; I win lots of beers with that bet.
Yellow beer?

Or red and green beer?

Author:  salzberg [ Wed Aug 25, 2004 8:06 pm ]
Post subject:  Re: Upgrading lighting systems

Yes.

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