In choosing an LED Grow Light There are Factors you Need to Know
In choosing an LED Grow light there are many factors that you will want to take into consideration. First and foremost is the light’s spectrum. LED grow lights are made up of many small LEDs, or light-emitting diodes, that each project one specific wavelength of the electromagnetic scale. We interpret this as the visible (sometimes invisible) color of a diode. Plants use and absorb an array of colors from 400nm to 700nm in order to carry out photosynthesis and other developmental processes. Plants that are not receiving their complete lighting spectrum needs can become leggy and produce only wispy flowers.
Another important consideration in choosing an LED grow light is the power of the diode chipset or wattage. Single watt LEDs are weak and do not have enough intensity to penetrate the canopy of the plant. three-watt diodes are considered the sweet spot. They incorporate the perfect blend of intensity, durability, and low operating temperature that all LED lights to need to succeed. Three watts LED chips can also be driven at the most efficient power level of any sized chip, capable of running at around 80% power, with no detrimental degrading of the chip.
Root zone temperature needs to also be monitored. Running the air temp higher than 85F generally REQUIRES proportionally cooler dark period air temps to maintain an average root zone temp below 75F. Oxygen saturation in water drops off rapidly above 75F. So allowing the average root zone temp to get much higher than 75F will starve the roots for oxygen