Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

What is Tube Light?Tube shaped fluorescent lamp is termed as tube light. Tube light is a lamp that works on low pressure mercury vapor discharge phenomenon and converts ultra violate ray into visible ray with the help of phosphor coated inside glass tube.Material Used Inside the Tube LightThe materials used to build a tube light are given below. Filament coils as electrodes Phosphor coated glass bulb Mercury drop Inert gases (argon) Electrode shield End cap Glass stemAuxiliary Electrical Compone

A fluorescent tube light consists of a lime glass tube drop of mercury argon gas phosphor coating electrode coils mounting assemblies aluminum capTotal set up of a lamp requires two bases and electromagnetic ballast or choke coil with a starter. The electrode mount assemblies are at both the ends of lamp tube. This electrode mounting assembly is almost similar to the stem press unit in the incandescent lamps. The electrode is similar to theincandescent lampfilament. The filaments of electrodes p

What is Electronic Ballast?An electronic ballast (or electrical ballast) is a device that controls the starting voltage and the operating currents of lighting devices.It does this through the principle of electrical gas discharge. An electronic ballast will convert power frequency to a very high frequency to initialize the gas discharge process in Fluorescent Lamps – by controlling the voltage across the lamp and current through the lamp.Use of Electronics BallastThere are some advantages to use

In case of fluorescent lamp the mercury vapour pressure is maintained at lower level such that 60% of the total input energy gets converted into 253.7 nm single line. Again transition of the electrons requires least amount of input energy from a colliding electron. As pressure increases the chance of multiple collisions gets increased. A schematic diagram of mercury lamp is shown below. This lamp is containing an inner quartz arc tube and outer borosilicate glass envelope. The quartz tube is abl

What is Fluorescent Lamp?A fluorescent lamp is a low weight mercury vapour lamp that uses fluorescence to deliver visible light. An electric current in the gas energizes mercury vapor which delivers ultraviolet radiation through discharge process and the ultraviolet radiation causes the phosphor coating of the lamp inner wall to radiate visible light.A fluorescent lamp has changed over electrical energy into useful light energy to a great deal more proficiently than incandescent lamps. The norma

Fluorescent lamps are widely used as light sources in various applications, such as homes, offices, schools, and industries. They are more energy-efficient and durable than incandescent lamps, which produce light by heating a metal filament. Fluorescent lamps produce light by exciting a gas mixture inside a glass tube with an electric current, which emits ultraviolet (UV) radiation. However, UV radiation is invisible and harmful to human eyes and skin, so it needs to be converted into visible li

The radiant flux emitted from a point source in a certain direction per unit solid angle per unit projected area perpendicular to the specified direction is called radiance.Radiance is denoted by Le,λ and it is equal to the double derivative of radiant flux with respect to projected surface area As and Solid angle ωs.where, ÆŸ is the angle between normal to the elemental and the given direction.dAs is the elemental area and dωs is the elemental solid angle containing the given direction.The unit

Irradiance is the radiant flux received by the detector area. The unit of irradiance is W/m2. Irradiance is denoted by Ee,λ,φs is the received radiant flux on the detector surface and AD is the detector area or surface.Irradiance always follows the Inverse Square Law. Suppose from a point source the radiant flux is being received by two surfaces of A1 and A2 where they are equal surface area. They are placed at r1 and r2 distance.Now the flux received by the surfaceAnd the flux received by the s

The Inverse Square Law of IlluminanceThis law states that the Illuminance (E) at any point on a plane perpendicular to the line joining the point and source is inversely proportional to the square of the distance between the source and plane.Where, I is the luminous intensity in a given direction.Suppose a source is present with luminous intensity I in any direction. From this source two distances are taken as the radius making this source as centre.As per the above figure, the two radiuses are

Tristimulus ValuesFundamentally there are three colors. They are Red (R), Green (G) and Blue (B). Any color that stimulates human eyes is the mixture of R, G, and B in a certain proportion. Let us consider C is the color of an object as the test color. We have taken three sources of R, G, and B color to take an experiment.The screen is taken to match the color of the test light and the source lights. The upper half of the full screen is taken as Screen 1 and next half is taken as Screen 2. Now t