Fluorescence
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Fluorescence is one of two kinds of photoluminescence, the emission of light by a substance that has absorbed light or other electromagnetic radiation. When exposed to ultraviolet radiation, many subs
Fluorescent minerals emit visible light when exposed to ultraviolet.
Fluorescent marine organisms
Fluorescent clothes used in black light theatre production, Prague
A cup made from the wood of the narra tree (Pterocarpus indicus) beside a flask containing its fluorescent solution Lignum nephriticum
Fluorescent lamp
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A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, to pr
Linear fluorescent lamps illuminating a pedestrian tunnel
Top: two non-integrated compact fluorescent lamps. Bottom: two fluorescent tube lamps. Both types require a ballast in the light fixture. A matchstick, left, is shown for scale.
Typical F71T12 100 W G13 bi-pin lamp used in tanning beds. The (Hg) symbol indicates that this lamp contains mercury. In the US, this symbol is now required on all mercury-containing fluorescent lamps.
A "tombstone" style lamp-holder for T12 and T8 G13 bi-pin fluorescent lamps