Low Pressure Mercury Vapour Lamp Diagram

As pressure increases the chance of multiple collisions gets increased.

Low pressure mercury vapour lamp diagram.

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. Fused silica is used in the manufacturing to keep the 184 nm light from being absorbed. 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. Rather than a cold spot the lamp s amalgam spot on pellet regulates mercury vapor pressure during operation and yields up to three times the uvc output of a standard low pressure mercury lamp of the same length.

The first mercury vapor lamps were in a lower pressure tube. In medium pressure mercury vapor lamps the lines from 200 600 nm are present. The aperture phosphor coated lamps that jelight company produces employ the same basic design as the double bore low pressure mercury vapor lamps with the exception of a special phosphor coating. One would tip the lamp and electrical contacts on each side of the lamp would send electricity through a liquid mercury which started the lamp.

This coating covers more than 70 of the diameter of the lighted length of the lamp. Two varieties of such lamps exist. Amalgam lamps use a mercury amalgam mix to control mercury vapor pressure. Again transition of the electrons requires least amount of input energy from a colliding electron.