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FAQ - Grow Lights

There are some common problems you may encounter when using LED grow lights. Below I have listed ways to resolve these issues - 

1. The lights are dim or flickering

Dimming or flickering LED grow lights may be caused by a defective LED chip. This may be due to overheating, excessive current, or manufacturer defaults. To resolve this issue, do the following - 

  • Make sure the river provides the proper current and voltage
  • Check electrical wiring
  • Replace defective LEDs
  • If the problem cannot be solved, contact an electrician 

 

2. Loose or damaged connections

If you find that half of the fixture is working fine but the other half is not, loose wiring may be the cause. Over time, LED grow light connections can become loose or damaged. This ultimately blocks continuous light flow. If you find any loose connections, follow these steps- 

  • Tighten all connections
  • Reconnect them one by one
  • Check whether the driver is normal
  • If there are any broken wires in the wiring, replace them

 

3. Controller or timer failure

LED grow light controllers help you adjust light intensity, wavelength, and on/off time according to your plants’ needs. If the controller is not working properly, it will not provide accurate lighting output. This ultimately hinders the natural growth of the plant. So, follow the following points to resolve this issue- 

  • Double check your controller settings
  • Make sure the battery in the timer or controller is OK
  • Reset them to ensure they are connected accurately to the LED grow lights
  • If the above solutions don't work, replace your device

 

4. Spectral or color issues

Sometimes LED grow lights may not display an accurate color spectrum. It may be caused by the manufacturer's default or purchase error. For example, purchasing a red spectrum grow light for the vegetative stage will not be effective.  

  • Purchase LED grow lights based on desired spectrum
  • If you purchased the correct product but it is not showing accurate results, please contact the manufacturer.
  • Always buy LED grow lights from reliable brands or sources.

 

5. Insufficient light intensity

Another major issue with LED grow lights is that it sometimes may not provide the required light intensity. This could be due to using the wrong wattage light fixture, or the light source being too far away from the plant. To resolve this issue, follow the following points- 

  • Purchase LED grow lights based on the intensity requirements of your specific plants.
  • Make sure the light you purchase has the correct PPFD rating and wattage.
  • Try to keep the distance between your light fixture and your plants as short as possible to increase light intensity. But keep in mind the light heating factor when doing so. Fixtures should not be placed too close together to avoid damaging the plants through overheating. 
 
6.What color of light is best for plant growth?

 

Blue and red light are best suited for plant growth. Blue light in the 400-500 nm range is well suited for the vegetative stage of the plant. It is essential for leaf elongation, root development and other vegetative growth. On the other hand, red light in the 600-700 nm range is required for the flowering and fruiting stages of the plant. This light stimulates the production of hormones, which in turn activate germination and fruiting.
 
7.What is the optimum light intensity for plants?
Different plants have different requirements for light intensity. Likewise, this requirement varies for different growth stages. For example, less light intensity is required during the sowing period, but high light intensity is required for flowering/fruiting. However, in general, 1000 to 2000 µmol/m ²/s is considered the optimum light intensity for plants. Or you can also choose LED plant growth lights with a candlelight range of 500 to 1,000 feet or 15 watts or more per square foot area.
 
8.Are plant growth lights really useful?
Yes, plant growth lights work. They are designed to mimic natural sunlight to affect plant growth. It produces all the spectrum that promotes plant seeding, meditation, flowering, fruiting and throughout its life cycle. Pants absorb the light from these growth lights for photosynthesis, producing carbohydrates that aid growth.
 
9.Is LED lighting conducive to growth?
Yes, LED lights are great for growing. They come in different spectral ranges and are essential for different plant stages. LED grow lights also offer spectral tunability to meet the requirements of all plants. Apart from that, they produce the least amount of heat and have a long service life. Also, the energy efficiency of LED lights is worth mentioning. With these lights, you don't have to worry too much about electricity bills.
 
10.What spectrum can plants use for photosynthesis?
The plant uses a spectrum between 400 nm and 700 nm for photosynthesis. This spectral range is called photosynthetically active radiation (PAR). Plants absorb these spectra through chlorophyll for the photosynthetic process.
 
11.Is IR in the infrared spectrum helpful for plant growth?
Infrared IR has a great impact on plant growth. Typically, IR has a wavelength range of 700-1000 nm. This wavelength stimulates plant height, leaf expansion, and flowering time. In addition, the red wavelength of infrared light can affect stem elongation, seed germination, photosensitive pigment activation, and more.
 
12.What Kelvin is best suited for the nutritional stage of cannabis?
For the growth stages of cannabis, 4000K to 6500K LED growth lights are the best. They provide a light blue hue that affects the plant's nutrient growth, including leaf and root development.
 
13.What Kelvin is best suited for the flowering stage of cannabis?
Color temperatures of 2700K to 3000K are best for the flowering period of hemp. The wavelengths of red and orange light fall within this Kelvin range. This helps stimulate flowering hormones and promotes plant germination.
 
14.Should I use incandescent, fluorescent, or LED plants for lighting?
Incandescent lamps only last for 1000 hours, and are very energy efficient. They also do not offer any adjustable options for the wavelength of light. Fluorescent lamps are a better option than incandescent lamps, though, but produce toxic gases. They can last for hours, and have limited options for spectral tunability. LED plant lamps, on the other hand, are energy efficient and have a long service life. In addition, they have many options for spectral tuning that are suitable for all plant growth stages. Considering all these factors, you should choose LED plant growth lamps instead of incandescent or fluorescent lamps.
 
15.What are the main types of plant growth lamps?
The main types of grow lights include LED grow lights, HPS grow lights, HID grow lights, as well as fluorescent and incandescent grow lights. Among them, LED is the most popular variant.