When it comes to LED grow Lights, forget LUMENS

How Many Lumens Do LED Grow Lights Produce?

Lumens, Watts, PAR, PPFD, Grow Area Coverage

Many growers ask us about Lumens of our full spectrum LED grow lights. Lumens are a measure of how bright a light will appear to the human eye, not how well a LED light will grow plants. Although a good way to measure metal halide, high-pressure sodium, t5, and CFL lights, lumens will not accurately describe the growing ability of the LED grow light. This is because LEDs are not maximizing brightness. Rather, G8LED grow lights maximize the portions of the light spectrum that help plants in photosynthesis. For example, the red, far-red, and infrared diodes are critical in a LED grow light. However, these colors do not emit bright light and would have a low lumen measurement. Although lumens are a good metric to measure the brightness of a light, it doesn’t convey meaningful information about the growing capability of LEDs.

G8LED lights are designed with a weighted average of the optimal wavelengths needed for the photosynthesis of plants. G8LED lights maximize the portions of the light that the plants need most, such as the red and far-red wavelengths, and minimize the portions that are used less. A grow light that is only white light is not able to do this and is therefore not as efficient. G8LED lights also have the added advantage of ultraviolet (UV) and infrared (IR) wavelengths. All-white LED grow lights missing these critical wavelengths produce lower yields because they are not optimized like a G8LED grow light.

How to Measure LED Grow Lights

So, how should we measure LED grow lights? The strength or intensity of the light can be measured by the total wattage of the LED grow light. The higher the wattage, the more intense the light will be. The coverage area of a grow light is another good measure of its strength. Another measure is the photosynthetic action radiation (PAR) output of a grow light, which measures the effectiveness of a grow light for plant photosynthesis. PAR value is measured in Photosynthetic Photon Flux Density (PPFD ) μMol/m2/s in micromoles per meter squared per second.  PPFD measures the amount of PAR light (photons) that arrive at the plant’s surface each second. Effective PAR values should be above 500μMol/m2/s to be effective for plant photosynthesis. G8LED grow lights have strong PAR ratings of 600-1700μMol/m2/s which means they are very effective in growing plants. 

G8LED lights maximize the power consumed by the light to provide the highest yields per electricity consumed. Grow healthier plants, with robust flowers with more trichomes. G8LED lights grow plants with more flavor, aroma, and potency.

3 thoughts on “When it comes to LED grow Lights, forget LUMENS

  1. Ralph says:

    Follow up… By the numbers you gave, That’s 8000 micromoles/total/s at the floor, though there is no light loss to absorption due to the near perfect reflective ability of the room itself. So much light will be bouncing from every angle that no plant will be shaded or in an inferior position…
    I’ll put the entire system on a dimmer for better control. I’m pretty sure led’s are dimmable. I hope.

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