RLT™ stands for Recycling Light Technology™. The RLT is a small, low-cost, passive component that increases the projected light output of conventional LEDs by 150-300%.  Our patented RLT optics achieve these results by collecting the wide-angle “waste” or “stray” light that normally diffuses from a LED source using conventional illumination systems.  (Think about the difference between an overhead light bulb illuminating everything in a room and a spotlight that’s pointed in only one direction.)  The light inside the RLT is redirected back onto the LED phosphor light source, increasing emittance, and then directed out the RLT’s aperture opening, resulting in a more compact, focused, and brighter beam.  This narrow output projected beam is totally uniform and just as bright at the edge as it is in the center, with no “hot spots” and a "hard edge" between the light beam and the background (as shown in the picture below).  The usable light output is significantly boosted by the RLT retroreflector with no additional power required.