A lighting device including at least one first light source configured to emit a visible light through a first light emitting surface, at least one second light source spaced apart from the first light source and configured to emit light having a wavelength for sterilization through a second light emitting surface, and a housing having a bottom portion, on which the first and second light sources are disposed. The housing can include at least one sidewall portion connected to the bottom portion to enclose the first light source and the second light source in one common area, in which the first and second light emitting surfaces face substantially the same direction, and both the first light emitting surface and the second light emitting surface can be disposed at a different elevation from the bottom portion of the housing.

A lighting device including at least one first light source configured to emit a visible light through a first light emitting surface, at least one second light source spaced apart from the first light source and configured to emit light having a wavelength for sterilization through a second light emitting surface, and a housing having a bottom portion, on which the first and second light sources are disposed. The housing can include at least one sidewall portion connected to the bottom portion to enclose the first light source and the second light source in one common area, in which the first and second light emitting surfaces face substantially the same direction, and both the first light emitting surface and the second light emitting surface can be disposed at a different elevation from the bottom portion of the housing.

A lighting device including at least one first light source configured to emit a visible light through a first light emitting surface, at least one second light source spaced apart from the first light source and configured to emit light having a wavelength for sterilization through a second light emitting surface, and a housing having a bottom portion, on which the first and second light sources are disposed. The housing can include at least one sidewall portion connected to the bottom portion to enclose the first light source and the second light source in one common area, in which the first and second light emitting surfaces face substantially the same direction, and both the first light emitting surface and the second light emitting surface can be disposed at a different elevation from the bottom portion of the housing.

A lighting device including at least one first light source configured to emit a visible light through a first light emitting surface, at least one second light source spaced apart from the first light source and configured to emit light having a wavelength for sterilization through a second light emitting surface, and a housing having a bottom portion, on which the first and second light sources are disposed. The housing can include at least one sidewall portion connected to the bottom portion to enclose the first light source and the second light source in one common area, in which the first and second light emitting surfaces face substantially the same direction, and both the first light emitting surface and the second light emitting surface can be disposed at a different elevation from the bottom portion of the housing.

A gobo used to project an image by selectively transmitting and blocking light includes a blank made of transparent material. There is an etched or frosted area on the surface of the blank having a surface morphology characterized by micro-pyramids, which may be produced using a pico-second or femto-second laser. The micro-pyramids cause micro-lensing to occur when the gobo is in use, thereby rendering the etched or frosted area fully opaque and cause the gobo to produce a sharp projected image.

A gobo used to project an image by selectively transmitting and blocking light includes a blank made of transparent material. There is an etched or frosted area on the surface of the blank having a surface morphology characterized by micro-pyramids, which may be produced using a pico-second or femto-second laser. The micro-pyramids cause micro-lensing to occur when the gobo is in use, thereby rendering the etched or frosted area fully opaque and cause the gobo to produce a sharp projected image.

An LED light bulb includes a first bent segment is formed at a top end of a first pin, and a second bent segment is formed at a top end of a second pin, the first bent segment and the second bent segment being substantially disposed on a first plane to form a mounting platform, the first plane being substantially perpendicular to an axial direction of a glass shade, the first bent segment and the second bent segment being spaced apart and bent in opposite directions; the LED illuminant is secured on the mounting platform and welded to the first bent segment and the second bent segment in an electrically conductive manner, respectively; and the package body encapsulates the LED illuminant and respective weld joints between the LED illuminant and the first bent segment and between the LED illuminant and the second bent segment.