Low Pressure Mercury Lamp Voltage

A sodium vapor lamp is a gas discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm.

Low pressure mercury lamp voltage.

Open circuit voltage must be high enough to start and sustain the particular lamp type. Ushio germicidal lamps are low pressure mercury arc lamps that emit radiation peaking at 253 7nm uv c. Again transition of the electrons requires least amount of input energy from a colliding electron. In addition to the mercury the tube is filled with argon gas at low pressure.

The lamps come in both standard and high output selections and are ozone free. Softglass lamps are one of our quality low pressure mercury lamp products. Fluorescent lamps a heated cathode lamp the most common lamp in office lighting and many other applications produces up to 100 lumens per watt. Gilway technical lamp engineering catalog.

A neon lamp also neon glow lamp is a miniature gas discharge lamp the lamp typically consists of a small glass capsule that contains a mixture of neon and other gases at a low pressure and two electrodes an anode and a cathode when sufficient voltage is applied and sufficient current is supplied between the electrodes the lamp produces an orange glow discharge. As pressure increases the chance of multiple collisions gets increased. At room temperature 250 volts dc is usually sufficient for low voltage 135v types while 325 volts dc will be needed for high voltage 265v types 135v 265v. Designed by experienced engineers and by using quality material in combination with a tightly controlled manufacturing process we provide high quality lamps free of impurities to maintain strong and stable output throughout life of the lamp.

Low pressure lamps have working pressure much less than atmospheric pressure. To facilitate starting of the lamp a third electrode is mounted near one of the main electrodes and connected through a resistor to the other main electrode. The most common form of germicidal lamp looks similar to an ordinary fluorescent lamp but the tube contains no fluorescent phosphor in addition rather than being made of ordinary borosilicate glass the tube is made of fused quartz or vycor 7913 glass. These early low pressure lamps used a lot of mercury today s lamps use a tiny amount of mercury.

Low pressure mercury lamps are very similar to a fluorescent lamp with a wavelength of 253 7 nm 1182 5 thz. Nyc subways were still using original mercury arc rectifiers to convert ac to dc power up until the end of the 20th century. For example common fluorescent lamps operate at a pressure of about 0 3 of atmospheric pressure. Two varieties of such lamps exist.

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. The mercury in the tube is a liquid at normal temperatures. They have a germicidal efficiency of 30 and can operate on lower current between 180 and 425ma.