Blue light alone does not have a whitening effect. The purpose of the blue light is to speed up the teeth whitening process. It should be used with a bleaching solution. The combination of chemical and blue light significantly increases the final whiteness level of the teeth.
LED lighting devices experience significant energy loss during AC-DC power conversion, electro-optical conversion (electroluminescence), and wavelength conversion. Unlike conventional technologies, in LEDs, all energy losses in the light emitting process are expelled as heat. This presents a major engineering challenge where more than half of the power input is converted...
The most common causes of LED failures are the use of poor quality LEDs, improper soldering of the LEDs, exposure to high temperatures, insufficient heatsink design, no current limitation in the power supply circuit, and problems with the battery.
Lamp and luminaire are common terms when talking about lighting. These terms are often confused and often used interchangeably. What do the names lamp and luminaire mean? Which term is correct to use when referring to a lighting unit?
Amsterdam, the capital of the Netherlands and the country's most populated city, is launching a new trial with LED lighting at intersections. Thanks to this remarkable lighting, it is aimed for cyclists to see the red light more easily and to prevent accidents.
The University of Guelph in Controlled Environment Systems Research Facility (CESRF) has been investigating controlled-environment plant production and how to grow plants in space for food, oxygen, fresh water and carbon dioxide—human life supports.
Researchers in the US has proved that light produced by LEDs can speed up plant growth, and can also improve the taste of fruits and vegetables. The researchers are also proving that LED light can treat disease in plants. This discovery can cut down on the usage of expensive and,...