Light burn is one of the growing problems that many growers face on a regular basis, especially for beginners. Light stress occurs when plants are exposed to too much light. Light stress is a state in which a plant receives too much light and is harmful. If plants are exposed to light stress for a long period of time, it can cause mild burns. Light burn is therefore generally the result of improper use of artificial light sources and the damage can lead to a reduction in yield. So how do you use led grow lights to repair/avoid light burn?
I. How do I spot a plant with light burn?
Many people will judge by the colour of the leaves, such as when they turn from green to yellow or brown; but in fact, only yellow leaves are not certain that light burn has occurred, as a similar phenomenon occurs with nutrient burn (nute burn). nute burn is caused by too much nutrient in the fertiliser, blocking the water, so the plant is dehydrated causing the leaves to change colour. Therefore, when you see a colour change in the leaves, you can also rule out nute burn by looking to see if there is also a colour change in the roots, as nute burn usually starts at the roots of the plant.
Other typical features when nute burning occurs.
1. Bleached buds: If the plant has buds, when you see the buds being bleached you will clearly see that they are white.
2. Green veins: the leaves will start to turn yellow when LB, but the colour of the veins will not change, which means that the leaves will not turn completely yellow
3. Yellow leaves do not fall: Normally yellow leaves fall naturally, but this does not happen when using LB. However, if your plant's leaves change colour and fall off at an inappropriate time, it may be due to other problems such as insufficient nutrition
II. How can I treat light burns?
As light burn is due to too much light intensity, the only way to treat it is to adjust the light intensity. The usual way to do this is to adjust the distance between the light fixture and the plant. This is for older plant lights that do not have light intensity control. This is a troublesome method. Why? Because the light intensity and DLI that plants can tolerate at each stage of growth is actually different and needs to be adjusted regularly according to the growth of the plant, which sometimes also faces difficulties in terms of lack of space.
Therefore, it is more appropriate to have a plant led grow light with a control function. We recommend a plant grow light equipped with intelligent controls like our grow light Ultra Plant, which not only controls the light intensity, but also the spectrum and can set the working time. It is more punctual and automatic than the gardener. What's more, our smart-enabled plant grow lights come in a wide range of options from 150W to 1000W. 800 watt led grow lights use unique technology to help growers. Full spectrum + spectrum adjustment design, infinite light formula and smart system to easily control the light distribution strategy.