Patent ID: 8740414

Claim:
A lamp, comprising: a dichroic filter; a substrate having a top surface, and a bottom surface opposite to the top surface; a light emitting diode for emitting light towards the dichroic filter, wherein, the light emitting diode is disposed on the top surface of the substrate; a reflector being tube-shaped and having first and second open ends, wherein the first open end is disposed on the top surface of the substrate surrounding the light emitting diode, and the second open end is spaced apart from the top surface of the substrate, the reflector reflecting the light emitted by the light emitting diode; and a lampshade surrounding the dichroic filter and the light emitting diode; wherein one portion of the light that is emitted by the light emitting diode, reflected by the reflector, and within a predetermined frequency range is passed through the dichroic filter; wherein another portion of the light that is emitted by the light emitting diode, reflected by the reflector, and outside the predetermined frequency range is refracted by the dichroic filter; wherein the portion of the light that is passed through the dichroic filter exits from the second open end of the reflector having a viewable angle that is substantially from 30 degrees to 90 degrees, wherein the viewable angle is an angle between two extremes of a sector formed by the light when viewing the lamp from the side, wherein the two extremes of the sector formed by the light irradiate on the lampshade at a first predetermined height on the lampshade; wherein the other portion of the light that is refracted by the dichroic filter exits from the second open end of the reflector and irradiates on the lampshade at a second predetermined height thereon, wherein the first predetermined height is a greater distance from the top surface of the substrate than the second predetermined height.