How Far Should LED Grow Lights be from Plants?

The details of what might increase the yield of your cannabis plants lie in the smallest changes in their environment. Sometimes, the importance of light needed for the plants to grow can be overlooked. 

So, in this article, we will talk about the exact placement of light around your cannabis seeds that will increase the productivity of your plants exponentially.

The simple and most important question is how far should the LED grow lights be from your marijuana plants? To produce the most buds, you need the source of light at the right distance.

Since light is literally the food for your plants, the more they get their food and nutrients from light, the more they will grow. However, you should also take into account the fact that giving too much light to the plant can cause light burn and kill your plants too.

The T5s, CFLs don’t really produce enough light to provide as per the needs of your plants. HPS, LECs, LEDs are considered to be ideal for optimum plant growth. They keep your plants potent and let them grow more than average.

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how far LED lights should be from plants

Of all the options, LED Grow Lights help make the magic happen. When you put the LED lights at the sweet spot, it will definitely reward you with more produce.

The spectrum of LED lights is more so they don’t generate more a lot of heat so as to kill the plants with more power, they also provide the right amount of energy so that the plant is not nutrient deficient and resulting in bleaching.

LED lights should be placed right above the plants at an appropriate height. If a lamp doesn’t work for you, you might want to hang the lights with a rope or string.

LED Grow Light Distance Chart

Includes distance needed for:

  • HID Wattage
  • Vegetative Distance
  • Bloom Distance
  • Spectrum
  • Lumens
  • Size )Inches)
  • Weight
HID WattageVegetative DistanceBloom DistanceSpectrumLumensSize (inches)Weight
200 W12”-20”8”-12”380-780nm960011 x 7.9 x 1.82.8 Lbs.
250-400 W16”-30”16”-18”380-780nm1255011.8 x 6.4 x 24.5 Lbs.
550-650 W24”-30”16”-20”380-780nm1520014.9 x 9.4 x 4.45.35 Lbs.
600-800 W32”-36”18”-22”380-780nm1563014.0 x 9.0 x 3.54.75 Lbs.
900-1000 W36”-42”18”-24”380-780nm2221614.2 x 13.2 x 2.46.57 Lbs.
1200 Watts30”-36”18”-24”380-780nm3896613.78×9.84 x2.26.72 Lbs.
1500 Watts30”-36”24”-30”380-780nm4251215.75×8.39×2.379.2 Lbs.
2000 Watts26”-30”18”-24”380-780nm4966539.21×9.97×3.547.85 Lbs.
Proper Grow Light Distance for Plants

The LEDs need to be at least 15 inches away from the plants. However, there are different LED bulbs that you might want to consider before concluding the right distance of lights. Here are some most important voltage bulbs and the appropriate height you would need to keep away from the plants:

  • (240-400w LED Grow Lights) 16-30” away from plants
  • (450-550w LED Grow Lights) 20-30” away from plants
  • (600-850w LED Grow Lights) 24-26 away from plants
  • (900w+ LED Grow Lights) 26-42” away from plants

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