Factors in Choosing a Quality Lighting Luminary for a Building Assignment

Factors in Choosing a Quality Lighting Luminary for a Building - Assignment Example It is evidently clear from the discussion that a fluorescent lamp refers to a low-pressure mercury lamp powered by an electric current. In a construction of a fluorescent lamp, a glass tube is filled with a mixture of argon and mercury vapor at low pressure. The inner side of the tube is coated with the phosphoric coating. The basic structure is as in the diagram presented in the paper. When the light is switched on, current flows through the electrodes in the tube and as a result, it passes through the gas which is contained between the electrodes. The current flow results in the emission of Ultraviolet light from the mercury arc which is converted to visible light by the fluorescent coating found on the inner side of the tube. The circuit contains a starter switch (which is a bimetallic strip), an inductor, a small radio suppressor capacitor and a power correction capacitor that is connected to an AC or DC power supply. The power supply provides the necessary current required to op erate the lamp. This type of lamp contains an outer glass envelop that is filled with nitrogen gas. The nitrogen gas acts as a coolant in that it keeps the arc tube at correct temperatures. It also contains a quartz discharge tube which is filled with argon gas and some small amount of mercury which is in liquid form. Either end of the discharge tube contains two electrodes and a secondary electrode which begins the discharge. The secondary electrode is connected in series with a 10 – 30 â„ ¦ resistor. At first, there is no current flow when the lamp is powered on. Then the power supply voltage appears across the main electrode and between one of the mains electrodes and the secondary electrode through the series resistor. Consequently, there is a production of an arc between the secondary and the main electrode resulting in occurrence of ionization. The pressure and the heat build-up results in the formation of more high pressure and vaporized arc between the electrodes.