This image shows a prototype illumination rig I have just built using 18 ultra-bright white-light LEDs and powered by a computer PSU. The idea is to create a compact, high-power, flicker-free light source for photographic applications. This prototype array (I estimate) kicks out the equivalent of a 200W light bulb, yet it consumes only 20W. A useful photographic studio array would therefore need around 100 LEDs in a 10 x 10 array and would supply the equivalent of a 1000W thermal light source. There is a CPU fan behind the LED array providing some forced-air cooling. In a short while I will be testing the array out with Tony Allen to see how it performs in high-speed video applications. I will almost certainly put a “snoot” reflector over this array, and Tony will being down a Fresnel lens to go over the front of the snoot. Should be an interesting experiment 🙂
You could try Luminus Phlatlights (http://www.luminus.com/), the brightest give several hundred W worth of light from a single chip! It’s amazing to see how far LEDs have come in the past few years.
PEter
Many thanks for that link Peter – they certainly look the business!!! Much more practical connector design as well, definitely a big improvement on my lash up.
Greg