What is the ideal distance between grow lights and the cannabis plants? Does this distance change based on the type of light being used?
One answer “What is the ideal distance between grow lights and plants?”
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When selecting grow lights for your cannabis plants, the ideal distance between the lights and the plants will depend on the type of light being used. The various types of grow lights availableâfrom fluorescent lighting to high-intensity discharge (HID) to LEDs (Light-emitting diodes)âall produce different intensities of light and therefore require different light distances.
Letâs start by discussing fluorescent lighting because of its affordability and relatively wide availability. It produces light that is closest to natural sunlight, making it a popular choice for many home growers. Fluorescents emit a low intensity light, so for optimal growth, they should be placed close to the plantsâgenerally between 2-6 inches away. Itâs important to remember that with fluorescent lighting, the closer you place them to the plants, the brighter the light on their leaves.
Next up is HID lighting, which has much more intense brightness than fluorescents and is most often used in large, commercial grow operations. HID bulbsâlike metal halide and high-pressure sodiumâusually require much farther distances than fluorescent lighting but will still depend on the wattage of the bulb being used. Generally, most HID bulbs should be suspended 6-12 inches away from the plants, but be sure to check the manufacturerâs instructions for the exact distance.
If youâre looking for a more energy efficient option, LEDs might be the light for you. Since LEDs produce a more focused light than HID lights, it can be beneficial for plants growing in small areas, like a grow tent. LED light can be placed as close as 1-4 inches away from the plants, depending on the wattage of the bulb and the size of your grow space. Itâs important to remember, however, that LEDâs produce a much higher intensity of light than fluorescents or HIDâs, so if youâre using LEDs, itâs probably best to err on the side of caution and keep them a bit further away from the plants than you would with the other light types.
No matter what type of grow light youâre using, itâs important to consider the needs of your plants when deciding the ideal distance for your lights. All cannabis plants require an intense light source, but finding the perfect balance between the light intensity and distance is key. Take into account the size of the grow space and wattage of the bulb when deciding on the ideal distance between the light and the plants, and use the manufacturerâs instructions as a reference to ensure the best results.