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A wide variety of special light fixtures are created for use in the automotive lighting industry, aerospace, marine and medicine sectors. [2] [3] Portable light fixtures are often called lamps, as in table lamp or desk lamp. In technical terminology, the lamp is the light source, which, in casual terminology, is called the light bulb.
Color corrected" mercury bulbs overcome this problem with a phosphor on the inside of the outer bulb that emits at the red wavelengths, offering whiter light and better color rendition. Mercury-vapor lights operate at an internal pressure of around one atmosphere and require special fixtures, as well as an electrical ballast. They also require ...
Moravian stars in the Striezelmarkt in Dresden A Moravian star half assembled A completed Moravian star hanging by a church. A Moravian star (German: Herrnhuter Stern) is an illuminated decoration used during the Christian liturgical seasons of Advent, Christmas, and Epiphany representing the Star of Bethlehem pointing towards the infant Jesus. [1]
Some bulbs have a phosphor coating on the inner side of the outer bulb to improve the spectrum and diffuse the light. In the mid-1980s a new type of metal-halide lamp was developed, which, instead of a quartz (fused silica) arc tube as used in mercury vapor lamps and previous metal-halide lamp designs, use a sintered alumina arc tube similar to ...
An illumination is an Advent, Christmastide, and Epiphanytide decoration in the form of a lighted candle originating in the Moravian Church. [1] These lighted candles are placed in the windows of Moravian Christian churches and homes in the evening with the symbolism to "guide the footsteps of the infant Jesus" to their settlements.
The GU24 fitting is intended to maintain the energy efficiency of the light by preventing an occupant from using an incandescent bulb instead of a CFL. Adapters to use incandescent bulbs in a GU24 fitting are illegal in the State of California as they would be a fire hazard in fixtures designed for the lower heat output of a CFL bulb. [2]