LED lamp with ND-glass bulb

摘要

LED based lamps are disclosed. In an embodiment, an LED based lamp (10) includes a concave optical diffuser (11), a concave neodymium-doped glass bulb (13), a reflector (15), a printed circuit board that includes a plurality of light-emitting diodes (LEDs) configured to emit light, and a heat sink body (20). The concave optical diffuser (11) has a first interior volume (12), and the concave neodymium-doped glass bulb (13) is positioned within the first interior volume (12). The neodymium-doped glass bulb (13) defines a second interior volume (14), and both the reflector (15) and the printed circuit board are positioned within the second interior volume (14). The reflector (15) includes a sloped annular wall with an inner reflective surface and an outer reflective surface, and a bottom portion of the reflector is connected to the printed circuit board. The heat sink (20) is thermally connected to the printed circuit board and to the reflector (15).