Lighting Distance(meter/inch) |
Intensity |
PPFD / PAR |
Coverage (m² / ft2)* |
2m / 79 inches |
955lx |
670 |
7.6m2 / 81.8ft2 |
1.5m / 59 inches |
1692lx |
1170 |
5.0 m2 / 53.8ft2 |
1m / 39 inches |
3663lx |
1670 |
3.0 m2 / 32.3ft2 |
0.5m / 20 inches |
12,500lx |
2170 |
1.5 m2 / 16.1ft2 |
0.2m / 8 inches |
50,300lx |
2670 |
0.5 m2 / 5.4ft2 |
Seedlings
For seedlings, LED growth lights should usually be installed between 24 and 36 inches above the plant canopy -- however, this also depends on the power (wattage) of the light source. Place the LED planting lights farthest (~ 36 inches) from the seedlings -- this will keep heat and light levels low and help prevent drying out. Once the root system is established and starts budding, you can move the lamp closer (usually within the first 2-3 weeks).Vegetative
During the vegetative phase, LED planting lights should be 12-24 inches from the top of the tree canopy. At this stage, photosynthesis requires more light, so light sources should be located close to the plant.Over-closed Light Distance Cause "Light Burning"
When plants like cannabis are exposed to too much light at any stage, they often show symptoms of distress. Since LEDs do not emit much heat, the main issue that needs to be closely monitored is any signs of "light burning." Other side effects associated with grow lights being too close to the plant canopy may be discoloration or growth retardation/irregularity. Both must be identified quickly and the height of the grow lights adjusted accordingly.How to Identify "Light Burning"
There are signs of light burning in cannabis plants, including upturned leaves and what's called "bleaching." Bleaching is white or yellow spot on the leaves closest to the light. A light burn can also be recognized when the veins of a plant turn green and the rest of the leaves turn yellow.LED Grow Lights Provide Specific Spectrum
Applying LED growing lights into cannabis growing is becoming more common as growers move crop production indoors. LEDs also benefit growers because they can use specific spectrum to provide more targeted lighting conditions for different crops. Compared to traditional grow lights, LED grow lights are also of lower power consumption, lower positive heat, and increased yield in a shorter time.LED Grow Lights Help to Grow Desired Plants
The adjustable light distance of LED grow lights reflect the growers' desired height and uniformity of their plants. If we look at the crop demand for salad vegetables or lettuce compared to marijuana, we see that salad vegetables and lettuce are better suited for short, wider growth.5-7 Days Fast Shipping
30-Day Free Return
Shop with Confidence
7/24 Service