Even though most of our knowledge on ultraviolet light seems to be undesirable, a bit of ultraviolet light is still safe. UV light is divided into 3 groups according to their wavelengths and are UVA, UVB, and UVC. In this post, we will be discussing if UVA/UVB lights are good for plants.
As a grower, you should have an idea of the exposure of ultraviolet light on your plants and how the growth of your plants. So, let’s dive in and explore how UVA/UVB lights affect the growth of your plants.
Ultra Violet Lights & Their Types
Ultraviolet light is electromagnetic radiation which has radiation shorter than visible light and is present in the sun.
There are 3 different types of ultraviolet lights and they include:
- UVA: the ultraviolet A wavelength ranges from 320 to 400nm. The natural light that passes through the earth is made up of 3% UVA light. UVA light makes up most of the entire amount of UV light on the earth. You should however know that UVA lights for plants do not cause DNA impairment.
- UVB: the wavelength of the ultraviolet B ranges from 290 to 320nm. It makes up about 0.15% of natural the entire sunlight. The UVB light rays are capable of causing damage to the DNA of cells and they can as well cause cancer in living cells. The good news is that nearly all of the sun’s UVB rays are obstructed by the Earth’s ozone layer.
- UVC: the wavelength of ultraviolet C ranges from 100 to 290nm. The UVC light is extremely energetic and it’s capable of killing living cells. It is even used for sterilization uses to kill harmful microorganisms. Fortunately, UVC light rays are filtered out entirely from the Earth’s surroundings.
Among these 3 ultraviolet lights, only UVA and UVB are used in little doses by plants. So, let’s take a look at how UVA and UVB play their roles in plants.
Benefits Of UVA/UVB Lights For Plants
Various plants respond in different ways when they are exposed to UVA/UVB lights. Below are some benefits UVA/UVB lights offer plants:
- Antioxidant Production: Generally, it’s been shown that plants enjoy an increase in antioxidants or flavonoids production.
- Enhance TCH & CBD: Also, both UVA and UVB in safe doses offer your plants that awesome flavor and smell from the oil they produce. The effect of UVA and UVB has been shown to enhance the production of THC and CBD in certain plants.
- Trichomes Production: The same way humans make use of sunglasses or sunblock to protect from the rays of UV, plants as well produce their natural sunblock or sunscreen. The sunblock plants produce is known as trichomes and the more the trichome production, the more the THC and CBD range.
- Enhance Germination: The germination process of indoor seeds that are just starting can be promoted by ultraviolet lights.
- Reduces Plant Shock: When your plants are still indoors germinating, they are still fragile to high light intensity. If you transplant them from indoors to outdoor, they might go into shock. This is because the light intensity outdoor may be too high for them to adjust. But when you expose them to a few UV lights when they are indoors germinating in their early stage, shock from outdoor transplanting can be reduced drastically.
UV Lights In Grow Lights
Most of the grow light available contains the entire visible spectrum and a few ultraviolet lights. This way, this uva uvb grow lights duplicate the natural sunlight in a very close range. However, you should know not all grow light contains ultraviolet light.
Too Much UVA/UVB Light For Plants
As we have said in a low dose, ultraviolet lights are safe for plants. However, when they become too much, they will cause harm to your plants.
Ensure your indoor plants are kept safe from the rays of outdoor lights. Ultraviolet lights can penetrate through your glass windows and cause harm to your plants if they are not positioned properly. So, ensure you keep your fragile plants far from the reach of the light rays. You can as well obtain some dark thick curtains to block out the ultraviolet rays.
Conclusion On UVA/UVB Lights For Plants
So, we have concluded that ultraviolet lights are safe in minimal doses for plant growth. Both UVA and UVB in safe doses can offer your plants good benefits.