5,000,000 candles

[Chance1234]

have that link somewhere! will keep diggin!

[twister!]

Cheers.

[twister!]

Chance - is this the kind of thing you're talking about (it has 60 LEDs)?


Here's a link to a US site that has them:
http://www.theledlight.com/trek6000.html

Or is your one even better than this?

<font color="#a62a2a" size="1">[ January 10, 2005 11:44 AM: Message edited by: Justin M. ]</font>

[jb_617]

To answer the original question, if you had a lamp capable of 5 million candlepower in a normal incidence beam you would set your subject on fire. It's hotter than the sun!

For an explanation of how companies bump up the Watts/Candle power rating of their lamps to a misleading ammount, see:

http://www.caves.org.uk/led/foot1.pdf


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Hmmmmmm...science.

[richard.fisher]

Sorry to dredge up this old thread, but I was talking to a friend this evening, and we got onto lighting. The difficulty we have is that if you are relying on public transport, and can only take what you can carry, lighting suddenly becomes a very big (and heavy) problem. Ever since I read this thread I was wondering about LED flashlights replacing, bulkier, heavier traditional filament lights.

Would these lights be suitable to use if - for the time being at least - i intend to be shooting on video. Would they be able to help light on location. I'm not inteding to shoot night for day, but like everyone, I struggle most when available light is nil (or close to nil). What kind of benefit would these produce? I've read dozens of reviews praising them, but have yet to see an imagine that was lit with one.

Chance, you said you had used them before, and had a link to some very powerful ones. If you still have it, could you post it here. Cheers.

[richard.fisher]

p.s. Nigel, I have bought Kris Malkiewicz's 'Film Lighting' and I am working my way through it. I'm finding it a little heavy going as the language they use is quite technical. The glossary is my best friend.

[Nigel]

Richard--

Just like any specialized area there are its terms and language. Just stick to it and if you need to go to a grip and ligting rental house do it and then you will be able to get your hands on some of these pieces of equipment.

Also, LEDs are moving into the lighting arena. If you do some searching on the internet you will see that companies are slowly getting their hands around them. I lit a scene using them--It was a car interior.

Good Luck

[jb_617]

Those LED lights are really good for spot lighting, but you wouldn't be able to flood fill a night exterior with them, they have a very small angle of incidence, &lt;4 degrees, in order to increase the luminance. I have no idea how to convert that to lux for a diffusion surface! It doesn't help that they quote those things in candela, which is no use to anyone.

They are quite nice though, and pretty cheap, although I guess the batteries die pretty quick which could cause you some problems over a long shoot.


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Remember: Keep that theta under 90 degrees!

[Nigel]

When I used LEDs for lighting I found the exact opposite JB. They are very diffuse and I had a hard time focusing them at all. The LEDs that I have in a head-lamp are the same way. They create a very wide pool of light. Power consumption on LEDs is also very low. They can go on and on using very little power and the LEDs themselves don't burn out...

Good Luck

[jb_617]

Huh? Weird, maybe we've used two different kinds. I don't know exactly what the ones I saw used were but they had multiple lamps inside the head in sort of a star pattern with a cowl over it. The DOP was using a couple of them as kickers. They were really nice. But I have to say, it was a very focused beam, maybe as narrow or narrower than a torch, and the batts started to fade after about 90 minutes. Not completely dead you understand, but enough so that the intensity went down enough to notice. Is there more than one type? It would be very cool if there was a flood model as, yes, they do use very little power at lower intensities.


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PS, good for you for deleting that Insomnia thread. It sucked.

<font color="#a62a2a" size="1">[ March 15, 2005 10:55 AM: Message edited by: jb. ]</font>