High power LED light for video?

No one has any thoughts? These look like really bright lights...could be an alternative to HMI's.



 
Nice...durability is one question. That's a pretty big heat sink. CRI is another area of concern. LEDs have come a long way. I like the price!!
 
Well the billboard fixtures look to be fairly durable...especially if they are designed to live outdoors.

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My main concern is CRI and color temperature. Temp varies depending on where you order from. Most give you options for 3-4,000k; 4-5,000k; and 6-7,000k. I'm hunting for a 5-6,000k version.
 
Doesn't look like it has beam control between wide and narrow so you can't really call it a fresnel. The beam control is part of the definition and expectations of something being a "fresnel". Its just a light that happens to have a fresnel lens on it and seems to output one, non-changing beam of light unless I'm missing something here.
 
That looks real interesting.
I see they have a dealer tab on the website with a state by state listing--- very helpful.
Would definitely like to hear Eriks comments about the green bias and apparent CRI.
If they are reasonably priced I would be tempted.
 
Okay, so I spoke to the guy from Light Source...really nice guy. He told me that the LEDs that he is currently using aren't reliably color balanced. He is working on creating his own phosphor versions which will be calibrated for both 3200K and 5600K versions. He's also working on a version that can be spotted and flooded.

I asked him to keep me updated as the new versions are available.
 
NextWaveG said:
Okay, so I spoke to the guy from Light Source...really nice guy. He told me that the LEDs that he is currently using aren't reliably color balanced. He is working on creating his own phosphor versions which will be calibrated for both 3200K and 5600K versions. He's also working on a version that can be spotted and flooded.

I asked him to keep me updated as the new versions are available.
Click to expand...


That's great!!
 
Cool Lights said:
Doesn't look like it has beam control between wide and narrow so you can't really call it a fresnel. The beam control is part of the definition and expectations of something being a "fresnel". Its just a light that happens to have a fresnel lens on it and seems to output one, non-changing beam of light unless I'm missing something here.
Click to expand...

Well Richard you'll just have to show us how its done :) We'll be waiting for the Cool Lights LED Fresnel!
 
I'd love to make one. I am getting an 85w LED soon, hope to experiment with that. I probably wouldn't go ahead with it though unless we can make that adjustable spot and flood beam feature. I feel thats more important than just about anything on a fresnel.
 
We've been asking for (and are beginning to see) spot / flood type Fresnel-like fixtures. The Light Source's fixture is very exciting because of the shape of the beam, but it is, for the moment, a flood only. I am personally big on these because they are designed as simple fixtures - as a studio fixture should be - and are designed by a heck of an engineer.
 
We now have the daylight version of the 100 watt light available. It puts out an incredibly even flood of light (about 140 degree angle) and, with Arri 650 Fresnel barn doors, shapes very nicely like a Fresnel at full flood.

Unofficial photometrics...

94 footcandles @ 5'
44 footcandles @ 8'
20 footcandles @ 12'

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MSRP is $995, contact me for a customized quote if you're interested.
 
Very cool.

I'm trying to figure out equivalent wattage for tungsten and I'm seeing a figure of 8x, so a 100w LED fixture should be the equivalent of a 800w tungsten. Not bad.
 
800 W tungsten ?

20 fc @12 ft. = 80 fc @6 ft. = 320 fc @ 3 ft. ( standard measurement distance)

320 fc divide by .092 = 3478 lumens = approximately 200 -250 W tungsten equivalent.

I've yet to see a single 100W led be equivalent to 800W with that efficiency of lux to power ratio.

The most efficient led out there is 100 lumens per watt when driven at 10 watts ( Cree XM-L) shelling out 1000 lumens each. Even 10 of those outputting 10,000 lumens would equate to 920 fc at 3 FT which is approx 580 W tungsten.
 
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