When it comes to LED grow Lights, forget LUMENS

How Many Lumens Do LED Grow Lights Produce?

Lumens, Watts, Power Draw, PAR, Grow Area Coverage

Many growers ask us about the Lumen output of our full spectrum LED grow lights. Lumens is a measure of how bright a light will appear to the human eye, not how well a light will grow plants. Trying to rate a LED grow light by its Lumen output will not accurately describe the growing ability of the LED grow light. LED grow lights target specific wavelengths of the light spectrum needed for plant photosynthesis. Since the human eye is most sensitive to colors plants don’t need such as green, and least sensitive to colors plants prefer, Lumens can’t be used to accurately compare the plant growing capability of LED grow lights.

Here is an example that brings this idea to light. In movie production many scenes are filmed with a “green screen” background which later is filled in with the scene needed. The reason the screen is green is because this is the color most easily seen by the human eye. On the other hand, green plants reflect the majority of green wavelengths of the visible light spectrum. G8LED lights are designed with a weighted average of the optimal wavelengths needed for photosynthesis of plants. G8LED lights maximize the portions of light that the plants need most, such as the red and far red wavelengths and minimize the portions that are used less by plants such as the yellow and green wavelengths. White light is not able to do this and is therefore not as efficient as a targeted spectrum light. G8LED lights also have the added advantage of providing plants with ultraviolet (UV) and infrared (IR) wavelengths, along with some white diodes to provide a complete and balanced spectrum. All White LED grow lights produce lower yields because they are not optimized and balanced like a G8LED grow light.

What is the best way to measure the strength and effectiveness of LED grow lights? The strength or intensity of the light can be roughly measured by the total power draw of the LED grow light. The higher the power draw, the more intense the light will be.The coverage area of a grow light is another good measure of it’s strength. Another measure is the photosynthetic action radiation (PAR) output of a grow light which measures the effectiveness of a grow light for photosynthesis or growth. PAR value is measured in micromoles per meter squared per second (μMol/m2/s), which is also known as the photon flux density of light per meter squared per second. Effective PAR ratings should be above 600μMol/m2/s to be highly effective in photosynthesis or the growth of the plant. G8LED grow lights have strong PAR ratings of 600-1500μMol/m2/s which means they are very effective in growing plants. Furthermore, due to the balanced spectrum and inclusion of ultraviolet diodes, G8LED lights maximize the power consumed by the light to provide the highest yields per wattage of power consumed. Grow healthier plants, with robust flowers with more trichomes. Plants grown with G8LED lights will have more flavor, aroma, and potency.

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