LEDs...

[McCready00]

Does someone know a good and clear web site where I might find informations about it.

These are now becoming an important part of the lighting industry. I'd like to read books about it but I am actually giving my time to Nick Mobsky's Practical Dimmers and Practical DMX (interesting books by the way).

Finally, I just need a link where I could get most of the basic information needed to understand the LEDs.

I am problably not the only one interested by it.

Thanks

[derekleffew]

LEDs-A Disruptive Technology, by Mike Wood, from Lighting Dimensions, June 2004.

[McCready00]

interesting.. I'll read it later tonight.

Thank you!

[gafftaper]

Also just do some searching around here. We've had lots of interesting threads discussing LED's in theater. The general consensus is it's really cool technology but it's not quite where it needs to be yet. A little brighter and a lot lower price and we are going to see a massive revolution in theater lighting.

[phil000]

I just wrote a 12 pg paper on them if you want it,
here ya go:
http://www.divshare.com/download/5480139-54a

This is some of my thoughts on the matter, you may or may not agree. I did research on it and know a good little bit about them from a flashlight standpoint. I would love some feedback. (I got an A on this one I think).

I may be in and out of the forums, so best bet is to email me if I'm unresponsive to this thread.

[audereengineering]

In the opposite direction of the original request:
Light-Emitting Diodes by Schubert is technical (very)
It is the best book I have read on LEDs

phil000:
Rough grinding on (sand blasting to sand paper) the dome on a LED to experiment with a cheap diffused LED source has been around for at least 20 years.
You probably want to experiment with a ray tracing program like Zemax but I will warn you that the source approximations are not an extremely accurate model for a LED but should be a good start for this application.

[phil000]

...I just did it for a class...and it's like a basic intro, hopefully just enough to get the OP a little bit of knowledge...

[David Ashton]

Originally Posted by derekleffew

LEDs-A Disruptive Technology, by Mike Wood, from Lighting Dimensions, June 2004.

Given that this was written 4 years ago how have the predictions compared to reality?Can anyone tell me

[gafftaper]

Looks to me like it's fairly close on performance. The 2007 projections look about right on performance of a 3 watt LED... the article predicted 2.7 watt LED's producing 75 lumens per watt in 2007. We have gone well beyond that as far as I can tell... although I'm not an expert. Secondly it says that LED's will start competing with incandescents 2007... well some of them are and some of them aren't. If you can afford the good ones, then yes they do compete nicely.

The only place I see the article is way off is the price doesn't seem to be dropping as fast as it predicted. But that's common with rapidly advancing technologies like this. The price drops rapidly on last year's technology but this years is still way too expensive. You've got your $100 Chinese made pars that have a ton of the old 1 watt LED's but if you want to get into the latest and greatest LED's the price is still pretty high.

So on the whole, I think it's pretty accurate. I know you are not a believer in LED's David, and I do agree with you that they aren't a viable option for most budgets at this point. But I am convinced that we are just a few years away from a revolution in price and intensity that will bring them into all our theaters.

[BillESC]

But I am convinced that we are just a few years away from a revolution in price and intensity that will bring them into all our theaters.

I couldn't agree more. For example, in the picture below, the fixture on the right was introduced about a year ago selling for $ 200.00, the one on the left has just arrived and is selling for well below $ 100.00