LED COBĬhip-on-Board or "COB" refers to the mounting of a bare LED chip in direct contact with a substrate (such as silicon carbide or sapphire) to produce LED arrays. LEDs are packaged in a few popular formats. This effect is called electroluminescence. When LED is forward-biased or switched on, electrons are able to recombine with holes within the device, releasing energy in the form of photons. The housing may incorporate one or many dies. A die, the part of the LED that emits light, is encased in plastic or ceramic housing. What is an LED?Ī light-emitting diode (LED) is a semiconductor device that emits light of a certain wavelength (color). The LEDs are often protected with a silicone or acrylic coating and the connectors and cables are Ingress Protection (IP) rated so that they can operate in damp conditions. LED grow lights are designed to withstand the high humidity in a grow room and will be able to withstand condensed water dripping on the grow light. It is about the same range of wavelengths as the visual range for humans. The measure of light intensity for plant growth is called Photosynthetically Active Radiation or PAR and includes photons of wavelengths from 400nm to 700nm or from deep blue to deep red.
Photosynthesis occurs when photons of light reach the plant leaves and causes a reaction which generates plant growth.
High light intensity is required to drive photosynthesis which generates plant growth. The minimum light intensity required to grow plants is at least 30 times greater than required for human lighting in an office environment for example. The answer is that plants require a much higher light intensity to grow plants effectively than humans need for vison. What is an LED grow light? What is the difference between and regular LED light and an LED grow light?
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