Lumen refers to a measure of the total amount of emitted visible light by a source. The total number of lumens varies according to the type of grow light, the type and number of plants, the total measurement of the area, the distance of the plants, and their height. If possible, you should also determine the current stage of your plant to know how much supplementary light you’d apply.
Moreover, if you have decided to continue the process indoors, it is a must to know the preferable amount of lumens every plant should receive. Determining the precise number of lumens prevents any damages on your plant. Thus, supplies the necessary optimal light for their productive growth.
What is a Color Spectrum?
Plants are genetically programmed to grow using sun light, which we consider to be white light, or yellowish-white light. This light looks white because it contains all of the colors of a rainbow, and when these colors are all mixed together they look white.
Scientists use wavelength numbers to refer to the colors instead of color names, which is a much more accurate way to measure the color. So a red might have a wavelength of 630 or 660. Both of these look red to us, but they are actually different colors.
Plant biologists define light in the 400nm to 700nm spectral region as “photosynthetically available radiation,” or PAR. The unit for measuring PAR, micro-mols per second (μmol/s), indicates how many photons in this spectral range fall on the plant each second. Inexpensive PAR meters use sensors that respond over the entire 400-700nm spectrum and have their own sensitivity curves that require different calibration for sunlight, fluorescent and HID lighting. All these systems are too broadly responsive to measure an LED’s narrow emission spectrum. They make HID grow light seem brighter by over-measuring yellow-green light and make LED light seem dimmer by under-measuring red and blue light.
lumens per watt
In terms of lumens per watt, today’s double ended HPS grow lights are quite efficient compared to other types of traditional artificial lighting, producing over a 100 lumens per watt.
However, when we consider LEDs, light output has already exceeded 300 lumens per watt in the lab. Like most electronics, LEDs continue to increase in efficiency and decrease in cost per lumen of output.
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 lights. 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.
Best LED Grow Lights for Sale 2020
Spectrum King 600W LED LowPro Flower
Bring the intensity of the sun closer to your plants with the Low Pro Flower. Designed specifically for vertical and racking solutions at only 3” tall, this makes it the shortest, brightest LED grow light on the market today. Guaranteed to maintain 90% or better light output for 3 YEARS with regular use.
ECO Farm ECOX 650W Foldable LED Grow Light Bars
The New ECO Farm ECOX Vertical Farming LED Grow Light takes Vertical Farming into the new era. ECO Farm ECOX is the vertical farming LED Grow Light that is engineered to be superior and outperform all of the Vertical Farming LEDs on the market today.
Finding the commercial grow lights on the market doesn’t come easy. It takes countless hours of research and comparison -- which I’ve painstakingly, but happily completed at your convenience!
If you’re wondering why you didn’t see other LED grow light brands or models on my list of the best LED grow lights -- it’s not necessarily because they’re terrible, but because they were beaten out by the grow lights I did include.
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