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Ben Edwards
LED lights
on Nov 17, 2009 at 11:02:27 pm

There are several multi LED lights on ebay for around £40. I am looking at this - http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=120481594460 - probably to put on a stand. It says it is 650 lux which is a reasonable amount of light (I think). This is for doing interviews. What do people think? Ben


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Mark Suszko
Re: LED lights
on Nov 18, 2009 at 4:01:14 pm

Lux is half the story, color rendition is more important.


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Ben Edwards
Re: LED lights
on Nov 18, 2009 at 4:49:11 pm

doing some digging it seems the amount of light these throw is not a lot unless you are within a couple of meters. Will look up color rendition. Thanks. Ben


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Rick Wise
Re: LED lights
on Nov 21, 2009 at 7:31:46 pm

650 Lux is 1/3 stop under f/4 at ASA 250. But that means nothing. The light gives off 650 lux at what distance? 15'? 10'? 6'? etc. And, what Kelvin? And, how much green spike?

Rick Wise
director of photography
San Francisco Bay Area
and part-time instructor lighting and camera
grad school, SF Academy of Art University/Film and Video
http://www.RickWiseDP.com
http://www.linkedin.com/in/rwise
email: Rick@RickWiseDP.com


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Ben Edwards
Re: LED lights
on Nov 22, 2009 at 3:22:09 pm

Thanks for taking the time reply. The below table was at the bottom of the page. With the interviews I will me using medium and "medium close up" shots so the lights would be 1-2 meters away. Would one or two of these lights add much. Although at £40 these are budget lights I am also interested in recommendations for more expensive options. I do have a couple of redheads but am looking for something a lot more portable.

Illumination:

Distance lux

1m 650
2m 170
3m 80
4m 50
5m 30


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Rick Wise
Re: LED lights
on Nov 22, 2009 at 7:19:28 pm

What is the existing light in the environment(s) where you will be shooting? Outdoors, indoors with window light? Indoors with overhead fluorescents? Etc.

If you are outdoors, these lights will do nothing for you other than possibly add a dot of light in the eye. If you are indoors with windows and/or overhead DAYLIGHT fluorescents, and IF they are balanced for daylight, then they will possibly add some fill. They are too weak, however, for a reliable unit to take into any existing environment. You could possibly make them work by placing them close to the subject, which is usually not a great way to go. And if you need to add some minus green and some diffusion, your light level will drop too low for much use.

Basically you want at least one unit you can use to key in a variety of lighting conditions. These do not seem to provide that option.

A more expensive but ultimately more satisfactory solution is one 4x4 KinoFlo with both tungsten and daylight tubes; and two 2 x 2 kinos with both types of bulbs. Also, c-stands for the kinos. Then some diffusion, some plus 1/4 green, sand bags, etc. Some people like the KinoFlo Divas. Lowell makes a Caselight that is similar.

Or, you could get a medium Chimera for one of your Reds.

If you want to travel with next to nothing, you can make pretty good images with available light and just an eye light. Your cheap unit might work for that. But then you have to be able to move people to where the light is good, and block off light you don't want. You must understand color temperature and CC filters. If you are just starting out, you will not yet have the eye to pull off this kind of opportunity seizing.

Rick Wise
director of photography
San Francisco Bay Area
and part-time instructor lighting and camera
grad school, SF Academy of Art University/Film and Video
http://www.RickWiseDP.com
http://www.linkedin.com/in/rwise
email: Rick@RickWiseDP.com


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Ben Edwards
Re: LED lights
on Nov 24, 2009 at 11:10:58 am

Thanks a lot, what would you recomend to use for a "eye light", I did some goodeling but did not find any recommendations.

Regards,
Ben


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Rick Wise
Re: LED lights
on Nov 24, 2009 at 11:08:35 pm

Ben,

An eye light is any light that puts a sparkle of light in the subject's eyes. I like to use a cheap, old fashioned "Flood Light" such as this: http://www.bhphotovideo.com/c/product/48743-REG/Smith_Victor_401002_A8UL_Ad.... Get the plastic diffusion screen (see "accessories"), a couple of ECA (tungsten balanced) and BCE (daylight balanced) 250 w. light bulbs. Add a mini-Cardelinni clamp (http://www.cardelliniclamp.com/mini_cardellini_clamps) for $52. Then splice in an in-line household dimmer and you are set. Dim the light up/down to taste. Remember, when you dim down a light, the color temperature becomes warmer, but a tiny bit of warm fill almost never hurts. All you are going for is that twinkle of light in the eyes, though with this unit, you sometimes end up using it as a soft fill as well.

The major drawback to the above is it is large. It may be the LED light you were considering would work fine too, especially with a piece of opal taped to the face, and perhaps some gels to balance the Kelvin temp. and also 1/4 plus and 1/4 minus greens to deal with fluorescents.

Rick Wise
director of photography
San Francisco Bay Area
and part-time instructor lighting and camera
grad school, SF Academy of Art University/Film and Video
http://www.RickWiseDP.com
http://www.linkedin.com/in/rwise
email: Rick@RickWiseDP.com


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