The visible spectrum is not very spectacular.
Low pressure mercury lamp emission spectrum.
The five well known emission lines of mercury hg at 405 436 546 577 and 579 nm are clearly visible.
Widely used in mercury vapor lamps.
Often called germicidal or ozone absorption lamps they are very stable light sources.
Aquafine standard low pressure lp and amalgam low pressure lp lamp spectrum.
Facts about aquafine standard low pressure lp lamps.
Low pressure mercury lamps emit sharp bands primarily at 185 and 254 nm.
Strong emissions occur in the 350 380 nm region at which typical uv photoinitiators absorb.
Aquafine lp lamps are considered to be monochromatic or single peak output lamps.
The strongest peaks of the emission line spectrum are in low pressure mercury vapor lamps only the lines at 184 nm and 253 nm are present.
The emission of low pressure mercury lamps exhibits a characteristic optical spectrum with pronounced spectral lines mostly in the visible and the ultraviolet spectral region but partly also in the infrared.
Widely used in sodium vapor lamps.
The power density and the radiance of the emitted light are relatively low.
Amalgam lamps use a mercury amalgam mix to control mercury vapor pressure.
There is not emission in the ranges uv b and uv c and also in the visible spectrum the emission is minimum.
Uv led 365 385 395 405nm spectrums compared with spectrum of uv mercury traditional lamp.
Sodium vapor low pressure bright orange yellow.
Line spectrum of mercury vapor.
The blue green tint of mercury vapor lamps is caused by the strong violet and green lines.
Only the light at 253 nm is usable unless synthetic quartz is used to manufacture the tube as the line is otherwise absorbed.
Lp lamps operate at about 40 c and have one useful disinfection output peak at 254nm.
In low pressure mercury vapor lamps only the lines at 184 nm and 254 nm are present.
Fused silica is used in the manufacturing to keep the 184 nm light from being absorbed.
In medium pressure mercury vapor lamps the lines from 200 600 nm are present.
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.
These types of lamps are available in ozone producing and ozone free quartz with a variety of phosphors.
