When buying led grow light , users need to know the basic requirements of LED plant growth lights:
spectrum: LED plant growth lights simulate natural light, but unless they are full-spectrum LED growth lights, this plant lamp does not always have all the colors in the visible spectrum. If users grow marijuana plants from seed to flowering, they should look for a combination of blue, purple, red and IR LED (far red ultraviolet should not be too much), while some studies have shown that blue and red light is sufficient.
Heat output: to avoid burning hemp leaves, the best LED plant lamps have cooling systems, such as radiators or fans, which can also help lamps avoid overheating.
Coverage area: the coverage area refers to the growth space of how many plants are covered by light at different heights. It is usually measured in feet overseas and usually falls between 2’2 ‘and 4′ 4’.
Power: the design power of the LED is positively related to the price, so the higher wattage will put more pressure on the wallet. The real measurement of power boils down to how much light the plant absorbs, between 400 and 780nm PAR. PAR stands for photosynthetically active radiation, in other words, the amount of visible light that plants use for photosynthesis.
Light intensity: the standard for measuring light intensity is micromoles per joule. In the product specifications of LED plant lamps, you will see that it is written as umol/j or PPF (photosynthetic Photon Flux). The best LED plant growth lamps have a high PPF because they produce more light quantum numbers per second. Looking for lights of 1.7 umol/j and above is possible for most plants.
In addition to PPF, you may also see measurements of μ mol/m2/s or PPFD (photosynthetic photon flux density), which sounds professional, but what a buyer needs to know is that PPFD measures the number of photons hitting the plant surface per second. You need to measure PPF and PPFD at different heights and different coverage areas to understand the intensity of light at different heights and different points. Voltage: often ignored by home growers, make sure that the buyer’s power outlet is within the voltage range of the LED plant growth lamp, especially if it includes a series function, which allows the user to connect multiple lights in a wide space, but puts a lot of pressure on the wall power supply. Warranty / service life: since LED plant growth lamps are a financial investment, having a warranty will reassure users and ensure that faulty parts can be returned and replaced.