General Parameters for LED

Lumen

Lumen is one of the most important parameters to measure the brightness of a light, the higher the number the brighter the light.

A lumen is a unit of standard measurement used to describe how much light is contained in a certain area. It is part of a group of standard measurements known as the photometry group, which measure different aspects of light. This group also includes such units as the candela, which measures luminance, and the lux, which measures illumination.

Power Consumption

In electrical engineering, power consumption often refers to the electrical energy over time supplied to operate an electrical appliance. Power consumption is usually measured in units of kilowatt hours (kWh). More accurately, power is the rate of consumption of energy, measured in watts or horsepower.

The energy used by equipment is always more than the energy really needed. This is because no equipment is 100% efficient. Power is wasted as heat, vibrations and/or electromagnetic radiation.

CRI

CRI (Color rendering index) is used to judge the accuracy of perceived color under artificial light. It is measured on a scale of 1-100, where the higher the number, the closer to standard colors (CRI=100) objects will appear. A compact fluorescent lamp bulb (CFL) with an 80 or above is suitable for residential use.

CCT

CCT (Correlated Color Temperature) also called color temperature.

CCT measures the appearance of the light itself, or how “warm” or “cool” it seems. Oddly, the lower the CCT value is, the warmer the light; CCT values below 3100 K indicate a warm white light. Standard incandescent bulbs have a CCT of 2800. Many fluorescents have a CCT of 3000 and provide the same warm, white, light that an incandescent bulb produces.