Answers to frequently questions about LED lights

Date：2025/10/14 11:17:49 Publisher：

• How are LED lighting products different from other lighting, like fluorescent or incandescent?

LED’s are small, solid light bulbs which are extremely energy-efficient. The VIRIBRIGHT LED light bulb is made up of clusters of LEDs (light emitting diodes) that illuminates beyond traditional incandescent bulbs or CFL bulbs while using much less energy. Until recently, LEDs were limited to single bulb use in applications such as instrument panels, electronics, pen lights and, more recently, strings of indoor and outdoor Christmas lights. Now available with standard bases which fit common household light fixtures, LEDs are the next generation in home lighting as well as a cost-effective means of lighting your environment.

 

• What is Color Rendering Index (CRI)?

A color rendering index (CRI) is a quantitative measure of the ability of a light source to reveal the colors of various objects faithfully. Light sources with a high CRI are desirable in color-critical applications such as neonatal care, photography and cinematography. CRI is representative by Ra, the higher the Ra value, the better the CRI. That is, the more real the color.

 

• What is LED color temperature (CCT)?

Color temperature is a standard method of describing colors for use in a range of situations and with different equipment. Color temperatures are normally expressed in units called kelvins (K). Note that the term degrees kelvin is often used but is not technically correct (see below). Color temperatures are stated in kelvins, not in degrees Kelvin. The "degrees" part of the name was made obsolete in 1967. However, the "degrees" reference has remained in common use in media industries, LED lighting-Color temperature applications

 

 

• What is PF value and efficiency?

PF and efficiency is to feedback the driver electrical performance, higher PF and efficiency is better performance.

 

• Why is the lifespan of an LED measured as lumen depreciation?

The lifespan of an LED is vastly longer than that of incandescent, fluorescent or HID lamp sources, generally lasting 50,000 hours or longer. Although the LED never really burns out, product lifespan is measured by lumen depreciation. The Illuminating Engineering Society (IES) currently recommends calculating the life of an LED at the point at which the LED reaches 30 percent lumen depreciation.