One of the main reasons why lots of growers prefer using LED grow lights other than being far more efficient is that they tend to produce as little heat as possible. With a traditional HID lighting option, you could be wasting around 95% of energy in the form of heat. Meanwhile, a LED grow light can run relatively cool while producing as little heat as possible. The difference between the heat output means that when you are using HIDs, you should place them 2 to 3 feet above the plant canopy, while you can place the LEDs extremely close around 12-18 inches to your plants. You should read the led grow light reviews before you decide.
Thermal management for LED grow lights
Despite being far more efficient and producing far less heat, there are still some heat issues which are associated when running a high powered LED grow light. LEDs are mainly cool to the touch since they don’t produced infrared radiation. You should remember that the higher the watts, the less energy efficient a LED grow light would become since it would convert more and more electricity into heat.
So where does the heat come from? The heat which is produced by a LED grow light comes from the semiconductors p-n junction because of some slight inefficiencies whenever an electricity is not converted into light. The p-n junction then heats the soldering point which causes the metal core printed circuit board (MCPCB) to heat up. This is then directed to a heat sink to allow it to dissipate directly into the surrounding.
The best LED grow lights in the market use heat sinks for controlling heat. The heat sink provides a path from the LED down to the device which dissipates heat. Most high powered LEDs with the best thermal management system use heat sinks which have materials such as copper, aluminium, thermoplastics and even graphite included. Since these materials will need a large enough surface area, it is only common to see the classic “fins” shape which is layered right next to each other unto the top of some high quality LED grow lights.
Thermal management in LED grow lights is a science itself. In fact, there are plenty of methods which can be used without any fans at all. When you include a fan in your grow light for managing heat issues, it could introduce a moving part, and these moving parts have a tendency of breaking down even before your LED grow lights begin to fade. However, if you have to buy a LED grow light with fans, you should make sure that they have a long warranty and the fans have a higher lifespan than that of the LEDs. For more information you can click here.