Luminous flux
- Updated:
- By: Kevin van Mierlo
Contents
What is a luminous flux?
Definition
Luminous flux, expressed in lumen, is the total amount of visible light emitted by a source. This is the direct indicator of a light’s brightness; the higher the lumen rating, the brighter the light. This is crucial when determining the efficiency of different light sources. Unlike wattage, which indicates energy consumption, luminous flux reflects the actual ‘light output’.
Units of luminous flux
There are several terms you need to be aware of when it comes to luminous flux. Some terms are sometimes confused. The number lumen of your lighting indicates how much light a light actually emits. Lumens therefore indicate how much light a lamp emits, but not how much light reaches a specific surface. For example: if you fit two LED work lights in the same position on your vehicle, the work light with more lumen will emit more light.
Wattage indicates how much power is required per unit of time to operate LED lighting. The wattage is always stated on TRALERT® LED lighting. Wattage is denoted by the letter “W”. The wattage can be calculated using a formula. The formula is as follows: the number of Volts × the number of amperes = the wattage. In short, the wattage therefore indicates how much energy your LED lighting consumes.
The number of Volts indicates the amount of voltage present at a connection. Volt is an abbreviation of the word voltage’. In the world of lighting terminology, the word ‘Volt’ is represented by the letter ‘V’. For vehicles, LED lighting is usually fitted with either a 12-volt or a 24-volt connection.
The number of amperes indicates the current. In the world of lighting, the word ‘ampere’ is denoted by the letter ‘A’. The stronger the current, the stronger the magnetic field. As a result, two parallel cables carrying current are attracted to one another. When these two cables are connected to the same power source and attract each other with the correct force, each cable carries one ampere.
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Author
Kevin van Mierlo
Lighting expert at TRALERT® - Kevin tests lighting and finds out everything about legislation. He can tell you all about it.
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