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DMS-Aberdeen
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Is there a simple way of calculating photon flux density from the lumens produced by a fluorescent tube?
Lumens is a unit of measurement for the total amount of visible light emitted by a source, regardless of its direction. It is used to measure the brightness or perceived brightness of a light source.
Lumens and watts are two different units of measurement. Watts measure the amount of energy consumed by a light source, while lumens measure the amount of visible light emitted by the source. In simple terms, watts measure power while lumens measure brightness.
Photon flux density is the number of photons that pass through a unit area per unit time. It is used to measure the amount of light energy that is falling on a surface. The unit of measurement for photon flux density is photons per square meter per second (photons/m^2/s).
Lumens and photon flux density are related as they both measure the amount of light emitted by a source. However, lumens measure the total amount of visible light while photon flux density measures the amount of light energy falling on a surface per unit area per unit time. In other words, lumens measure the amount of light emitted while photon flux density measures the amount of light received.
The lumens and photon flux density of a light source can be affected by various factors such as the type of light source, its efficiency, the distance of the source from the surface, and the angle at which the light is emitted. Other factors like environmental conditions and the quality of the light source can also have an impact on these measurements.