Infrared .5 watt emitter help

[lupy]

I am looking to build an emitter to use with a security camera, most of the Ir cameras just stack more and more small Ir leds to get any sort of range. I saw this:

http://www.dealextreme.com/details.dx/sku.4669

and was thinking about building a light to get a tighter beam. I also will need a reflector to give about a 45deg beam. Hopefully something without a hot spot, as that tends to screw up the pic, as cameras have limited dynamic range, you tend to blow out the center while leaving the surround black.

Thanks for any help
Ken