High Pressure Mercury Vapour Lamps Are Commonly Used As. They operate at a vapour pressure of about ten atmospheres, the discharge dissipates between 10 and 100 watts per centimetre of arc length, and their arc tubes are made of extremely refactory fused silica (quartz), which can withstand higher temperatures and pressures. Web for regular high pressure mercury vapor lamps used in general lighting.
The effect may be minimized by. Web applications of mercury vapour lamp. It has high operating pressure with mercury vapours, so it is called as the high pressure mercury vapour lamp.
Web High Pressure Mercury Vapour Lamp :
Web the lamps in which the light is produced due to the how of electrons through the gas are known as the gas discharge lamps. Particularly for lighting, they are increasingly replaced by other types of lamps which reach a higher luminous efficacy and/or work. Van de weher 4.1 description of the main types the fact that the high pressure mercury vapour lamp could be introduced successfully as a practicallight source, is due to the favourable spectrallight distribution, the high luminous efficiency, the relatively small lamp dimen sions and the possibility of an extensive range.
In Projector Ultra High Pressure (Uhp) Mercury Lamps, The Pressure Can Reach 200 Atm And The Temperature 10,000° Celcius.
Such lamps are made in sizes of 125, 250 w and upwards. The operation of the mercury vapor lamp is based on the excitation of atom of some gaseous medium. These are manufactured from 250 to 400w ratings and operate at 200 to 250v ac supply.
This Is Different From Fluorescents Which Use The Mercury Vapor Arc To Create A Weaker Light That Mainly Creates Uv Light To Excite The Phosphors.
They have a moderate efficacy and moderate color rendering. Therefore, an additional light guide is necessary to guide the uv light into the rheometer and to the sample. The extensive use of the mercury vapour lamp depends entirely upon the versatility of the mercury vapour as regards pressure, temperature, voltage and other characteristics, each change resulting in a lamp of different spectral quality and efficiency.
Web Among The Light Sources In Use For General Lighting, High Pressure Mercury Vapour (H.p.m.v.) Lamps With Lamp Ratings From 50 To 2000W Play An Important Role In Outdoor Lighting.
They emit primarily in the blue and green. Efficiency well in excess of that of. Parameters in different mercury lamps can vary greatly:
Lamps That Emit Light By The Passage Of Electric.
It uses an arc through vaporized mercury in a high pressure tube to create very bright light directly from it's own arc. Advantages of mercury vapour lamp. The heterogeneous part is inserted into a tungsten (w) wire to work as an electrode of the lamp.