What is wavelength ?
In physics wavelength is the distance between repeating units of a propagating wave of a given frequency. It is commonly designate...
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What is Luminous Flux ?
Luminous Flux (Φv) is energy per unit time (dQ/dt) that is radiated from a source over visible wavelengths. More specifically, it ...
What is Luminance ?
Luminance a measure (in candelas per square metre) of the brightness of a point on a surface that is radiating or reflecting light...
What is Luminous efficacy ?
Luminous efficacy is a property of light sources, which indicates what portion of the emitted electromagnetic radiation is usable ...
What is Luminous intensity ?
Luminous intensity is the radiating power of a source of light in a particular direction, weighted with the spectral sensitivity o...
What is lumen (lm) ?
The lumen (symbol: lm) is the standard unit for the luminous flux of a light source. It is an SI derived unit based on the candela...
What is the led chip ?
LED Light Emitting Diode (LED) is a solid-state semiconductor devices, which can convert electricity directly into to light. LED’s...
What is IP Rating ? Definition
IP rating also named as INTERNATIONAL PROTECTION, is defined by the IEC (INTERNATIONAL ELECTROTECHNICAL COMMISSION). It’s for grad...
What is Illuminance ? Definition
Illuminance is the total amount of visible light illuminating (incident upon) a point on a surface from all directions above the s...
What is Candela (CD) ?
The candela (abbreviation, cd) is the Standard International (SI) unit of luminous intensity. Like other SI base units, the candel...