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Kino bulbs in fluorescent fixtures


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#1 Charles DeRosa

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Posted 02 March 2006 - 10:32 PM

What are people's thoughts and experiences putting kino bulbs in normal fluorescent fixtures, especially if mixing it with other lights.

Because the kino ballast overcranks the bulb and a normal fixtures doesn't I'm afraid to trust the color. It looks off to the eye (which of course isn't particularly trustworthy).

Also, what kind of drop in output have you found? Down about 30% I'd guess.

Thanks,
Chuck DeRosa
Los Angeles
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#2 John Pytlak RIP

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Posted 02 March 2006 - 10:53 PM

What are people's thoughts and experiences putting kino bulbs in normal fluorescent fixtures, especially if mixing it with other lights.

Because the kino ballast overcranks the bulb and a normal fixtures doesn't I'm afraid to trust the color. It looks off to the eye (which of course isn't particularly trustworthy).

Also, what kind of drop in output have you found? Down about 30% I'd guess.

Thanks,
Chuck DeRosa
Los Angeles


This calls for a test. May I suggest two Macbeth Color Checkers in a 45-degree "V" arrangement, with one side of the V lit by the Kinoflo unit, and the other by the regular fluorescent? So you get a side-by-side comparison of color rendition and tone scale.
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#3 Charles DeRosa

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Posted 02 March 2006 - 11:05 PM

This calls for a test. May I suggest two Macbeth Color Checkers in a 45-degree "V" arrangement, with one side of the V lit by the Kinoflo unit, and the other by the regular fluorescent? So you get a side-by-side comparison of color rendition and tone scale.


John, that's an excellent idea. I'll be purchasing a kino bulb tomorrow. I love the side by side aspect of it too.
Chuck
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#4 David Mullen ASC

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Posted 02 March 2006 - 11:07 PM

I put Kino bulbs all the time in ordinary fixtures on location. I haven't noticed a visible shift in color. Anyway, when talking about color accuracy, compared to what other tube you could put into the fixture? A Kino 55 tube in an overhead fixture is still going to have a higher CRI value than a Chroma 50, Vitalite, or worse yet, a Cool White.
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#5 Phil Rhodes

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Posted 03 March 2006 - 10:39 AM

Hi,

It's entirely possible to change the colour of a tube by driving it differently. Overdriven they go purple, underdriven they go yellow. This could very adversely effect the CRI.

Phil
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