Led video lights - best method remove excess green

T

thabo

Well-known member
Just got a cheapy LED video light 500 leds and it has the noted green tinge to it (The litepanels also have this I believe) Does not look like too much of an issue but wondering what the best method to reduce it is - I can pull down the green or increase the blue? Both seem to work with my non calibrated apple 22 inch display. Just wondering what's the best method in post? Could use a gel too?
 
Minus green gel.

If you do it in post it will affect all the other lighting in the scene as well - and you should have other lighting, as trying to light everything with a cheap LED is a quick way to ugly cinematography. LED movie lights are not ready for primetime key light use (crappy spectrum, and will be replaced by plasma lighting technology soon anyway - continuous spectrum with similar power draw).
 
nothing said:
Minus green gel.
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Minus green gels eat up a lot of brightness, then losing the great advantage of led lights being cheap and practical.

If you do it in post it will affect all the other lighting in the scene as well - and you should have other lighting, as trying to light everything with a cheap LED is a quick way to ugly cinematography. LED movie lights are not ready for primetime key light use
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Replacing standard tripod lighting with LED fixtures is limited to some non-spotting types only. I would place led panels next to fluo types, with a slightly different spectrum. LED panels seem efficient than fluos to me, particularly in reach, but can be battery powered and are more sturdy. They are great for doc jobs and for location lighting, particularly as fills. In that case, even if you correct them in post, they can work quite well.

(crappy spectrum, and will be replaced by plasma lighting technology soon anyway - continuous spectrum with similar power draw).
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When will that happen? How expensive will they be? I'm not sure the technology is quite there yet, and might take 5 years or more to. Or am I wrong?
 
From experience, It should take around a 1/4 minus green gel, and a 1/8 CTO gel to help bring that light closer to 5600K and help with the green spike. Your mileage may vary.
 
carlmart said:
Interesting. If you compare them to Lite Panels they might be a little above led pricing, if you compare them to affordable portable lights they are a LOT above led pricing.

It would be interesting to see the reach of it to compare them to HMIs or maybe some open tungstens. Can you focus it?
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Looks like it can be focused using various reflectors to change the beam spread.
 
if you are good in post you can do do it in post via a shape mask for the color correction. It's really not hard especially if the camera is relatively still. Drop a little minus green with a feathered shape mask in the affected area and then color grade the image from there as you would normally. And for a moving shot, you can keyframe or auto track the shape mask. BOOM! But I am a young-gun and I love computers and have a fast edit rig, so YMMV
 
David W. Jones said:
From experience, It should take around a 1/4 minus green gel, and a 1/8 CTO gel to help bring that light closer to 5600K and help with the green spike. Your mileage may vary.
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This has been my gel recipe for correcting the green shift. I also almost always put opal on as well to make it nice and even without knocking the punch to far down.
 
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