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LED lighting - Page 2

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Posted: Sun Apr 22nd, 2012 16:23

11^th Post

Joined:	Sun Apr 1st, 2012
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Constable wrote:
I'm using a Manfrotto unit with 36 LEDs and a dimmer and camera mount.

it is Ok for fill lighting BUT (and this is a big but) you need to remember that it is not really white light. The spectrum is very different to sunlight. The colour temperature is all over the shop (no problem if you shoot RAW in principle). In practice, it is a problem because the colour temperature is hard to match because the spectrum shape is rather different to anything we are usually used to. In other words ... take care, colours may not be true.

For those who care about such things, the CIE chromaticity values are typically x = 0.27-0.3, y = 0.23 -0.28

Ed

Useful to know so a bit bluey/purpley!
Are the fluctuations due to small voltage varitions or just between the different LEDs in the array?

Can it be corrected with a gel ?

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Posted: Mon Apr 23rd, 2012 04:39

12^th Post

Eric

Joined:	Wed Apr 18th, 2012
Location:	United Kingdom
Posts:	4572
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jk wrote: Constable wrote:
I'm using a Manfrotto unit with 36 LEDs and a dimmer and camera mount.

it is Ok for fill lighting BUT (and this is a big but) you need to remember that it is not really white light. The spectrum is very different to sunlight. The colour temperature is all over the shop (no problem if you shoot RAW in principle). In practice, it is a problem because the colour temperature is hard to match because the spectrum shape is rather different to anything we are usually used to. In other words ... take care, colours may not be true.

For those who care about such things, the CIE chromaticity values are typically x = 0.27-0.3, y = 0.23 -0.28

Ed

Useful to know so a bit bluey/purpley!
Are the fluctuations due to small voltage varitions or just between the different LEDs in the array?

Can it be corrected with a gel ?
Its the reduced CO2 in them! :rofl:

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Eric

1st new

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