Received this today, and after testing this light by leaving it on for about an hour, the beam developed a multicolored blue band around the edge.  This is due to the plastic reflector overheating and becoming discolored.  I opened the light up and the plastic had a burnt smell to it.  Basically a poor design as the light is unable to handle the amount of light / heat that the bulb produces over a normal period of time.  Do not recommend purchase of this unit as the reflector issue ruins what is otherwise a nice light.