Category Archives: Lighting Basics
May 26, 2014

What Kind of Lighting Fixture Got the Best Luminous Efficiency

In the lighting industry, we can usually find those words: luminous efficiency, efficiency of lamps and lanterns, the whole light effectiveness, efficiency and effectiveness…Do you know what they are? Luminous efficiency represents how much light/lumens you get for a specific amount of energy watts. The unit of it is lumens per watt(lm/ W), luminous efficiency […]


May 20, 2014

Know more about CRI and How Important It Is in Our Daily Life

The colour rendering index (CRI), sometimes called colour rendition index, is a quantitative measure of the ability of a light source to reveal the colours of various objects faithfully in comparison with an ideal or natural light source. Light sources with a high CRI are desirable in colour-critical applications such as photography and cinematography. Colour index […]


May 13, 2014

Luminous Intensity in Our Daily Life and for Home Use

What is Luminous intensity and Candela We all know that luminous intensity is light intensity. In photometry, luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye. The SI unit […]


May 4, 2014

Recommended Illuminance For Home Use

First let us know more about illumination Illuminance means the illuminated object’s luminance fluxes per unit area. (lm/㎡), the unit is Lux. It can be measured by illuminometer/luxmeter and can be classified as horizontal illuminance and vertical illuminance. 1Lux means the brightness that 1 lm averagely distribution in 1 square metre place. (1 Lux = 1 lm/m2). […]