In this video I get the rare opportunity to test out an industrial grade LED stadium light, and my goodness it's bright! More info: www.mecreeled.com/product/gl-...
Next time on DIY Perks, I'll show you how to make a stadium for your new 1000w light, out of some MDF, a few offcuts of timber and some repurposed aluminium brackets.
Regarding the reflectors, they're known as total internal reflection, or 'TIR' optics. Basically they work by ensuring that all the light hits the boundary of the plastic at an angle greater than the critical angle. It all gets reflected forward and out of the front, rather than refracting out the sides. It's similar to how an optical fibre doesn't lose light out the side, even though it doesn't have a mirror coating.
With a dimmer switch, that would be a really awesome ceiling light. From pitch black to Tatooine, you can get any level of light. And in wintertime it can provide enough heating for the room too.