Ampres-(“Amps”) A measure of electrical Current. In incandescent lamps, the current is related to voltage and power as follows: Current(Amps)= Power(Watts)/Voltage(volts) |
Average Rated Life- Lamp life expresd in hours measuring when 50%of a group of lamps are likely to fail. If you install 100 lamps, from the time you start using them until the point at which 50% fail and 50% are still burning is the time frame ud to measure average rated life. |
慢慢的反义词Ballast-An auxiliary piece of equipment designed to start and properly control the flow of power to gas discharge light sources. |
Beam Angle- The angular dimension of the cone of light from reflectorized lamps encompassing the central part of the beam out to the angle where the intensity is 50% of maximum. The beam angle, sometimes called “beam spread”, is often part of the ordering code for reflectorized lamps. |
打麻将公式Candela- The international unit (SI) of luminous intensity. The term has been retained form the early days of lighting when a standard candle of a fixed size and composition was ud as a basis for evaluating the intensity of other light sources. Sometimes the term “candle power” is ud to describe the relative intensity of a source. |
Candle power- Luminous intensity expresd in candelas. Plots of luminous intensity, called candlepower distribution curves, are ud to indicate the intensity of distribution characteristics of reflector-type lamps. A measure of intensity mathematically related to lumens. Candlepower is often ud to measure the intensity of lamps that project light.男生追女生 |
Chromaticity- Also called Color Temperature. 彩色蛋 |
Color- Color rendering is also a critical element in industrial lighting systems. As lamp technology has evolved, the ability to get good color rendering without sacrificing efficiency has vastly improved. |
Color Temperature- Originally, a term ud to describe the “whiteness” of incandescent lamp light. Color temperature is directly related to the physical temperature of the filament in incandescent lamps so the Kelvin(absolute) temperature is ud to describe color temperature. For discharge lamps where no hot filament is involved, the “correlated color temperature” is ud to indicate that the light appears as if the discharge lamp is operating at a given color temperature. More recently, the term “chromacity” has been ud in place of color temperature. Typical color temperatures are 2800K (incandescent), 3000K (halogen), 4100K(cool white or Sp41 fluorescent) and 5000K (daylight simulating colors.) |
Efficacy- Efficacy is the rate at which a lamp is able to convert electrical power (Watts) into light (lumens), expresd in terms of lumens per watt(LPW). Put simply, a watt or electricity is the amount of power in and a lumen, or light , is the amount of power out. Efficacy is a critical consideration when evaluating a lamp becau lighting reprents 30to50% of the total operating cost of a typical installation and can affect related costs such as air conditioning. Secondly, Energy accounts for 86% of the cost of an average lighting investment(maintenance accounts for 11%: the lighting itlf, 3%) and has a major impact on operating costs, And finally, a lighting system that us energy efficiently is beneficial to the environment. |
Electronic Ballast- A short name for fluorescent high frequency electronic ballast. Electronic ballasts u solid-state electronic components and typically operate fluorescent lamps at frequencies in the range of 25-35 kHz. The benefits are: incread lamp efficacy, reduced ballast loss and lighter, smaller ballasts compared to electromagnetic ballasts. Electronic ballasts may also be ud with HID lamps, but he circuits are quite different, there are few designs at prent and only minor lamp efficacy improvements result. |
Halogen Lamp- A short name for the tungsten-halogen lamp. Halogen lamps are high-pressure incandescent lamps containing halogen gas such as iodine or bromine, which allow the filaments to be operated at higher temperatures and higher efficacies. At high temperatures, chemical reaction involving tungsten and the halogen gas recycles evaporated particles of tungsten back onto the filament surface. |
High Intensity Discharge (HID) Lamp- A general term for mercury, metal halide (GE Multi-Vapor, MXR, or Arc stream) and high pressure sodium lamps. HID lamps contain compact arc tubes, which enclo various gas, and metal salts operating at relatively high pressures and temperatures. |
High Intensity Discharge (HID Ballast systems- Hid systems are ud in a myriad of industrial applications. How they are ud in your facility will depend on the unique environments found there.有关人物品格的谚语 |
Incandescent- Incandescent lamps are the most familiar type of light source, with countless applications in homes, stores and other commercial ttings. Light is produced by passing electric current through a thin wire filament, usually tungsten. |
Illuminance- The “density” of light (lumens/area) incident on a surface. Illuminance is measured in foot-candles or lux. 汽车高清壁纸 |
Incandescent lamp- a light source that generates light utilizing a thin filament wire (usually of tungsten) heated to white heat by an electric current passing through it. |
Lamp- The term ud to refer the complete light source package including the inner parts as well as the outer bulb or tube. “Lamp”, of cour is also commonly ud to refer to a type of small light fixtures such as a table lamp. |
Lamp Warm Up/Restrike Time- The time it takes for a lamp to reach full brightness when the lamp is first turned on, or if the lamp is burning, the time it takes for the lamp to restrike when power is interrupted or switched off and then switched back on. |
Light- Radiant energy, which can be nd or en by the human eye. Visible light is measured in lumens. The term generally applied to the visible energy from a source. Light is usually measured in lumens or candlepower. When light strikes a surface, it is absorbed, reflected or transmitted. Light is said to travel in straight lines. |
Lumen-The basic unit of measurement for light. A dinner candle shines at about 12 lumens. A 60-Watt soft white bulb is much more powerful: 855 lumens. If a uniform point source of 1 candela is at the center of a sphere of 1-foot radius, which has an opening of 1 square foot area at its surface, the quantity of light that pass through is called a lumen. The sphere has a total surface area of 12.57 square feet. Since, by definition, a lumen flows to each square foot of surface area, a uniform point of 1 candela produces 12.57 lumens. The general term applied to families of smaller diameter is fluorescent lamps, some of which have built in ballasts and medium screw bas for easy replacement of incandescent lamps. |
Voltage- A measurement of the electromotive force in an electrical circuit or device expresd in volts. Voltage can be thought of as being analogous to the pressure in a waterline. |
Watt- A unit of electrical power. Lamps are rated in watts to indicate their power consumption. Power consumed over time equals the energy ud. |
| 乔迁之喜祝贺词 Underwriter Laboratories (UL)- A private organization which tests and lists electrical equipment for electrical and fire safety according to recognized and other UL standards. A UL listing is not an indication of overall performance. A UL listing is not an indication of overall performance. Lamps are not UL listed except for compact fluorescent lamp asmblies-tho with screw bas and built-in ballasts. |
活力的英文Ultraviolet (UV) Radiation- Radiation energy in the range of about 100-380 nanometer (NM). For practical applications, the UV band is broken sown further as follows: Ozone producing—180-220nm |
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