- Luminous Flux
Luminous Flux refers to the radiant power that can be felt by the human eye. It is equal to the radiant energy of a certain wave band in unit time multiply the relative visibility of this wave band. Since the relative visibility of the different wavelengths of light is different for our eyes, the luminous flux of the different wavelengths of light is not equal. The unit of Luminous Flux is Lumen(Lm). Led light bulb walmart best selling light should have high luminous flux to ensure the high brightness .
- Color Temperature
When the color of the light emitted by the light source is the same as the color of the black body at a certain temperature.The temperature of the black body is called the Color Temperature. The Unit of Color Temperature is Kelvin (K).Led light bulb walmart have a wide range of CCT from 2700-6500k, you can adjust it according to your current mood.
- Light Effect
The Light Effect is an important indicator for measuring the energy saving degree of a light source. It is equal to the Luminous Flux emitted by the light source divided by the power consumed by the light source.The Unit of Light Effect is Lumens / Watt (Lm / W)
- Color Rendering Index
The Color Rendering Index is the degree to which the light source is presented to the object and the degree of color fidelity.Usually called the “CRI”.The Unit of CRI is Ra.
- Illuminance
Illuminance refers to the extent to which an object is illuminated. It is equal to the ratio of the luminous flux obtained by the surface of the object to the illuminated area.The Unit of illuminance is Lux/lx（1 lux is the illuminance produced by a uniform luminous flux of 1 lumen on an area of 1 square meter）
- Power Factor
In the AC circuit, the cosine of the phase difference (Φ) between voltage and current is called power factor and is represented by the symbol cosΦ. In term of value, the power factor is the ratio of active power(P) to apparent power(S). The formula is cosΦ=P/S.
Power factor is a factor that measures the efficiency of electrical equipment. The low power factor indicates that the reactive power of the circuit for alternating magnetic field conversion is large, thereby reducing the utilization rate of the device and increasing the power loss of the line.
- Power
The power of the LED Lighting is equal to the work done by the current in unit time.It is a physical quantity used to indicate the speed of electric energy consumption. It is represented by “P”. The Unit of Power is Watt(W).
