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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Cool Lights LED... AMAZING

Jay A. Kelley said:
I don't know about the color mixing... i can do that with Gels and I am concerned that giving 1/2 my lights to another temp would cost me more than I want to pay in brightness.
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Yes sir, you are correct. It is the cost of being able to dial in a custom color. However, since I would choose 8000K as the upper color for the daylight side, then you will normally end up mixing both colors at least to some extent to get 5600k. And as with the RGB type fixtures you won't want it super close to your subject or you might see multiple color shadows. Some of the Zylights have this kind of issue for example.

As to why we choose 8000K instead of 5600K for the upper end, there are mainly two reasons:

1). Sometimes you actually want a very bluish tint light for various reasons and this would give you that without gelling. White balance to 5600k and you get a nice blue tint. For instance, choosing around 8000K could help with a day for night simulation.

2). 8000K 5mm LEDs have much less of the green spike issues that the 5000K to 6000K ones have. So, this gives us an opportunity to not only custom mix and get whatever color temperature we want within the range of 3000K to 8000K but it also lets us alleviate the green spike and produce something more approaching a full spectrum. Thus you shouldn't need any minus green when mixing with other lighting like real daylight.

3). One other benefit of 8000K LEDs is that they are even more bright and efficient in output than the 5000K to 6000K ones and quite a bit more than the 3000K ones too. So you get a bit more output than even what we're capable of now on the LED 600.

I was pretty sure most will feel this way, wanting the single color panel, but I will probably produce a few of the other one, no matter what as I know there are some out there wanting this capability.

So, mostly an all daylight panel with a few "mixer" models available for those that want the capability.
 
christopher witzke said:
yep.... head 1st.....

Glad to see your here often.... You make great gear and your customer support is the best I've seen! I was at a toyota plant today and the Deming method they work by reminded me of how you listen to everything your customers say.... and in turn, your products become exactly what they want.

I feel RED is the same way..... so it's a good thing your here as well!
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Well I've got a RED too, so obviously I'm an interested party in what's going on anyway around here. Especially been interested lately in the lens scene but kind of laying back as a "lurker" for the moment to see how it all plays out and also to let prices drop a bit and stabilize because they've been crazy. And see what other choices come as well. We're pretty close to Russia here and its easy to go there so I've also been thinking about checking out some of the options there too.
 
Richard Andrewski said:
3). One other benefit of 8000K LEDs is that they are even more bright and efficient in output than the 5000K to 6000K ones and quite a bit more than the 3000K ones too. So you get a bit more output than even what we're capable of now on the LED 600.
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This is true of the CoolLED Leds, and they were bright as hell, it was just a PITA to have to gel them down to 5600k, which is one of the reasons I sold them.
 
Richard Andrewski said:
Well I've got a RED too, so obviously I'm an interested party in what's going on anyway around here. Especially been interested lately in the lens scene but kind of laying back as a "lurker" for the moment to see how it all plays out and also to let prices drop a bit and stabilize because they've been crazy. And see what other choices come as well. We're pretty close to Russia here and its easy to go there so I've also been thinking about checking out some of the options there too.
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Well that is an exciting prospect! Look forward to whatever you come up with.

I had a few Arsats years ago that I used on a hassy and they made some pretty good images.... a bit clunky cosmetically but a fraction of the cost of the hassy lenses.
 
Matt Gottshalk said:
This is true of the CoolLED Leds, and they were bright as hell, it was just a PITA to have to gel them down to 5600k, which is one of the reasons I sold them.
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Of course. There's two ways to take the sting out of that though. 1). Provide a filter panel with the light that takes it down to 5600K or 2). Give the color mixing capability. We could do either or both. We already have two different minus green option acrylic panels coming sometime this summer so that will make whatever gelling you may need to do super painless on the existing LED 600.
 
Hi Richard,

Are you saying that a mixable panel with 8000k lights and warmer lights, due to the higher luminence of the 8000k lights would actually output a similar amount of light when dialed to 5000k as a panel composed entirely of 5000k?? Of course, with the added capability of 1) less green spike (so no gel) and 2) ability to choose other colors??
 
Hi Paul,

Yes should do. Of course, there's only ability to choose a color temperature of between 3000K and 8000K (shades of white from warm to bluer) with such a panel. The higher color temperature LEDs have the benefit of less green spike. And, its not a full RGB panel so you can't get single wavelength colors like red, green, blue, etc. out of it.

The other thing about all these types of panels whether they be RGB or just a dual color like this proposed one, you won't want to use them up close to the subject or you might see multiple color shadows. So you just back these panels away a bit or put some diffusion on them and that helps a great deal to with mixing and of course softening up what is a very hard light with LEDs.
 
That's what I thought you were saying--At daylight temperature (5000k = RED sensor) the multi-colored panel is approximately as bright as a panel exclusively made of 5000k LEDs.

Richard: make the multi-colored ones! And let me know when you've Joker bug style HMIs (ooops, sorry... no pressure :)

p
 
Hey Paul,

Sorry I missed that part of your question. The amount of light won't be exactly the same. You'll have two sets of LEDs on the panel and only one set will be primarily active in most cases unless you have both sets on full. So an all daylight panel of 1200 LEDs (for example) would be brighter in most cases than the mixed panel since you would probably have mostly one color on and part of another one dimmed down). That's the issue Jay was speaking too. You'd not be fully utilizing all LEDs in this scenario. For 5000K for example. You would probably dial in the 8000K full and then bring up the 3000K until you get the desired 5000K (say 30% intensity or so). Thus half the panel is operating at 30% intensity. So, it all depends upon how much you can fully utilize both sets to get what you want. My guess is that both sets full on might fall somewhere in the 4500K range but its hard to know for sure till you have the panel and do some tests.

On the full daylight panel (all 1200 LEDs are 5600K) then you would be operating with all LEDs at full intensity. To get 5000K you might gel down a bit but you also may find that 5600k is also just fine for the RED so not feel its necessary.

Just the tradeoffs involved in being able to dial in the exact color temp you want.

When people have an RGB type panel a similar thing is happening. Except you have it all happening on one LED with multiple chips and not all those chips on the LED will always be firing at full intensity so therefore you aren't fully utilizing the chip. Want all single wavelength red output to simulate a light with a red gel on it? Well you can do that but the intensity will be 1/3rd or so of the total possible output of the panel because you're only using 1/3 or each LED's capabilities.
 
Thanks Richard.

Is there merit in a panel with a higher number of 8000k lights than 3000k lights so that when all are on you hit your 5000k number (or 5600k), but with added bonus of some adjustability away from that 5000k mark up or down, albeit with loss of luminence?

Basically, your mention of the fact that 8000k bulbs are brighter than 5000k bulbs, and with better green handling, is very interesting. I want the intensity that a full panel of 5000 bulbs would offer--if I can get that intensity with the bonus of some color selection and a better color rendering....that's awesome.
 
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