What are the light sources in UV aging test chambers? Author：LINPIN Update Time：2025-05-16 Source：LINPIN UV aging test chambers primarily use cold-cathode low-pressure mercury lamps and hot-cathode low-pressure mercury lamps. Cold-cathode low-pressure mercury lamps come in various structural forms, such as straight tubes, U-shaped tubes, and spiral tubes. They are used in fluorescence analysis, medical applications, and photochemical reactions. These lamps provide high-intensity UV radiation but require a leakage flux transformer for ignition, making them less convenient to use. Hot-cathode low-pressure mercury lamps, introduced in 1936, were the earliest UV light sources in the world. Their bulbs are made of glass (quartz or high-borosilicate glass) that can transmit 254 nm UV light and are typically straight tubes. Hot-cathode low-pressure mercury lamps are the most widely produced and applied UV light sources, extensively used in hospitals. Medium-Wave UV Sources in UV Aging Test Chambers These mainly include UV fluorescent lamps, which have erythema effects and health benefits, making them suitable for medical and wellness applications. The glass of these lamps is made of soda-lime glass that blocks short-wave UV light, differing from ordinary fluorescent lamps only in their emitted wavelength range. Medium-wave UV metal halide lamps can also be used for medical and wellness purposes. Long-Wave UV Sources in UV Aging Test Chambers These primarily consist of: Long-wave UV lamps UV high-pressure mercury lamps UV xenon lamps UV metal halide lamps UV light-emitting diodes (LEDs) Long-wave UV sources are widely used in: Diazo copying, printing plate-making, and electrostatic copying Fluorescent flaw detection in mechanical industries Photochemical synthesis, photo-oxidation, and UV curing in the chemical industry Fishing and insect trapping in agriculture Forensic inspection and identification in public security Treatment of certain skin conditions Additionally, long-wave UV sources are increasingly valued in decorative lighting, advertising illumination, and stage effects.
