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ARRI L-Series LED Fresnels


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#1 Tim Tyler

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Posted 12 April 2011 - 02:42 PM


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#2 Phil Rhodes

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Posted 12 April 2011 - 06:35 PM

There are 83 LED emitters in each one, of three different types. Each emitter is about 2.2W worth, which is sane for currently-available types, and apparently they run them a little under maximum. To correct my earlier post on the same topic, the calibration is done at the factory and can be done again in the field, taking about an hour to heat-soak the chassis so that both hot and cold condition calibration can take place. They state that the efficiency is over 90%, whatever that means, so I assume that the power factor is similarly high.

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#3 Martin Hong

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Posted 09 September 2011 - 01:17 PM

Can do the color control and dimmable.. what else? i want one!

what was the max output again?

In the market when?
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#4 James Compton

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Posted 24 January 2012 - 06:55 PM

LED tech still needs some work. Wait a few more years before buying one. :

http://www.icgmagazi...sphorous-world/
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#5 Stuart Brereton

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Posted 25 January 2012 - 01:07 PM

Can do the color control and dimmable.. what else? i want one!

what was the max output again?

In the market when?


The photometrics put the L7T version's output somewhere between the tungsten 300w and the 650w fresnels.

A show I work on is awaiting delivery of some of the daylight versions. I'm looking forward to seeing how they perform.
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#6 Phil Rhodes

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Posted 25 January 2012 - 02:37 PM

Dagnammit, even Arri are overstating the output! They told me they were equivalent to 1Ks!

Is it possible for anyone, anywhere, ever, to sell an LED lighting product without claiming it has twice the output it really does?

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#7 Stuart Brereton

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Posted 25 January 2012 - 02:56 PM

Their promo material constantly mentions 1K fresnels as comparison, but their own photometric calculator says different.

EDIT: I originally compared output at full flood. At full spot, the L7T slightly outperforms the Tungsten 650w
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#8 Alessandro Machi

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Posted 13 February 2012 - 04:47 PM

Their promo material constantly mentions 1K fresnels as comparison, but their own photometric calculator says different.

EDIT: I originally compared output at full flood. At full spot, the L7T slightly outperforms the Tungsten 650w


Can we assume these led lights output a lot less heat? If so, then that would pretty much make them automatically much more energy efficient, no?
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#9 georg lamshöft

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Posted 28 February 2012 - 12:28 PM

That's true, you can even touch the lens after 1h of full output. If I remember correctly, it consumes only 1/4-1/5 of the energy (compared to a 1k fresnel).
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#10 Stuart Brereton

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Posted 07 March 2012 - 04:03 PM

That's true, you can even touch the lens after 1h of full output. If I remember correctly, it consumes only 1/4-1/5 of the energy (compared to a 1k fresnel).


They also output less light than a 1k fresnel. A 650w would be a fairer comparison.
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