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"Blacklight blue" lamps peak at 365 nm. [11] Compact fluorescent blacklight bulb. Manufacturers use different numbering systems for blacklight tubes. Philips' is becoming outdated (as of 2010), while the (German) Osram system is becoming dominant outside North America. The following table lists the tubes generating blue, UVA and UVB, in order ...
Typical mercury-vapor lamps with an outer envelope made of soda lime or borosilicate glass still allow a relatively large amount of 365 nm UV radiation to escape the lamp. This can cause the accelerated aging of some plastics used in the construction of luminaires, leaving them significantly discolored after only a few years' service.
The user repeatedly squeezes a handle to spin a flywheel inside the flashlight, attached to a small generator/dynamo, supplying electric current to an incandescent bulb or light-emitting diode. The flashlight must be pumped continuously during use, with the flywheel turning the generator between squeezes to keep the light going continuously.
340 nm 52 nm – Black-light fluorescent lamps Ultraviolet LAP LaPO 4:Ce Ultraviolet 320 nm 38 nm – Medical and scientific UV lamps Ultraviolet SAC SrAl 12 O 19:Ce Ultraviolet 295 nm 34 nm – Lamp Ultraviolet SrAl 11 Si 0.75 O 19:Ce 0.15 Mn 0.15: Green 515 nm 22 nm – Lamp Monochromatic lamps for copiers [37] BSP BaSi 2 O 5:Pb Ultraviolet ...
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Not all of the light is absorbed, and a small portion of the 520 nm laser light transmits through the top, unaltered by the ruby's red color. Fluorescence occurs when an excited molecule, atom, or nanostructure , relaxes to a lower energy state (usually the ground state ) through emission of a photon without a change in electron spin .