Light Burn

Light burn in cannabis cultivation refers to the damage that plants can suffer when exposed to excessively intense light or when grow lights are positioned too close to the canopy. This stress factor can lead to a range of symptoms including the yellowing or whitening of leaves, particularly at the top of the plant closest to the light source.

Leaves may also appear bleached or display a burnt look along the edges and tips, and plant growth can become stunted or deformed.

Symptoms and Misdiagnosis

Despite being a relatively common issue in indoor growing setups, light burn is often mistaken for nutrient deficiencies, as the symptoms can appear similar. However, unlike nutrient problems that typically affect the older, lower leaves first, light burn impacts the topmost leaves and those directly under the light.

Additionally, if growers notice that the leaves are canoeing or curling upwards, this can be a telltale sign of light burn, as the plant is instinctively attempting to reduce its exposure to the intense light.

How Does an LED Light Contribute to Light Burn?

LED light emitting diode technology can contribute to light burn when used at improper distances from plants. The intense and concentrated light produced by LED technology can cause leaf burning and other light-related stress. It’s important to carefully control the distance and intensity of LED lights to prevent light burn.

Prevention and Management

Prevention and management of light burn involve carefully monitoring and adjusting the height of grow lights, ensuring proper spacing based on the light intensity and the plant’s growth stage. Growers must also consider the use of appropriate light spectrums and implement adequate light cycles to mimic the plant’s natural environment.

Regular observation of plant responses to lighting and timely adjustments are key to preventing light burn, thus maintaining healthy cannabis growth and maximizing crop yield.