Lighting University

More and more consumers are meeting with LED lighting every day. LEDs are highly efficient and long-lasting light sources. LED lights must meet certain criteria to operate safely during their specified lifetime. Testing LED lamps and fixtures before they are released enables consumers to purchase high-quality products.

Every living thing needs energy to grow. Humans get their energy from food. Plants, on the other hand, get energy from light in a process called photosynthesis. Light initiates the growth cycle of the plant and supports its healthy development. Blue light is essential for the first stage of plant...

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...

LDR (photoresistor) and photodiode are two types of light sensors commonly used. When the LDR is exposed to light, its resistance changes. The photodiode, on the other hand, produces current when exposed to light. This is the main difference between LDR and photodiode.

Light consists of small packets of energy called photons. Light energy is a form of electromagnetic radiation and is the only form of energy visible to the human eye. Light energy travels in waves and is very fast. The sun, stars, lamps, lasers, and hot objects are examples of light...

Capacitors and supercapacitors are passive components that store energy in the form of an electrostatic field. Although the function of both is to store energy, there are some important differences between them. Supercapacitors can store more charge than regular capacitors and provide energy much faster than a battery.

White light used in homes, offices and outdoors affects people's biological clock and disrupts sleep patterns due to the high blue light it contains. High and prolonged exposure to white light causes toxic stress on the retina, negatively affecting visual performance.

Devices that can measure the temperature of objects remotely and quickly without any contact are called infrared thermometers. Infrared thermometers collect infrared light emitted from objects and estimate their temperature based on the amount of energy. These devices are frequently used in industrial applications as well as preferred by home...

In the lighting industry, lamps in which the brightness of the light can be controlled are called dimmable. Dimmable lamps make it possible to control the level of illumination, change the visual appearance of the space and save energy.

Italian physicist Galileo Galilei made a simple experiment with the help of lanterns in 1638. He and a friend each took a lantern and drove miles apart. As soon as one of them signaled with the lantern, the other gave the signal to him. Galileo divided the distance between two...

In the development of LED technology, it was initially planned to produce a single type of LED, but over time it was realized that this was not a viable approach. With the technological developments, different types of LED packages have emerged. TH LED, Mid-power LED, High-power LED, COB (Chip-on-board) LED,...

Kinetic energy is the energy possessed by an object in motion. Potential energy, on the other hand, is the energy that an object has because of its position or state. This is the main difference between kinetic energy and potential energy.

Symmetrical lights distribute light equally in all directions. Asymmetrical lights concentrate the light in one direction. This is the main difference between symmetrical and asymmetrical lighting. In indoor and outdoor lighting applications, it is extremely important to choose the right light distribution and angle in order to minimize glare, improve...

Flux is a chemical used when soldering electronic components to a circuit board. The main purpose of flux is to prepare the surface for soldering by cleaning the oxide and foreign materials on the metal surfaces. Flux is used to clean the circuit board before soldering. During soldering, it helps...

A photovoltaic cell, PV cell, solar cell, or solar cell is a component that produces electricity when exposed to light. The photovoltaic cell is made of semiconductor materials that absorb the rays emitted by the sun and generate an electric current. A solar panel is formed by bringing together more...

It is very important to position the lighting fixtures in order to illuminate the streets, roads and pavements correctly. No matter how bright lamps are used, the desired performance cannot be achieved if the lighting fixtures are not properly positioned.

Light measuring devices called lux meters can measure with high precision in a wide measuring range. But when it comes to LEDs things get a little more complicated. Different brands and models of lux meters may take different measurements at the same point.

There are two different application models, direct and indirect, for indoor and outdoor lighting. In direct lighting, the light is directed downwards, directly onto the surface to be illuminated. In indirect lighting, the light is directed upwards and reflected from the wall or ceiling.

There are some startling claims about LED lights, the latest and most efficient of lighting technologies. Misinterpretation of research in this area causes fears. Can LEDs really do that much harm to health?

In the lighting industry, LED refers to the LED package, not an LED chip. The LED package is a combination of one or more LED chips with mechanical supports, optical elements, electrical connections and thermal conduction paths. LED packaging is a critical process that affects the thermal performance, optical efficiency,...