If there is one drawback of using LED grow lights, it is that your plants’ grow time will be slower than if you were using HID lights. Again, this is because HIDs emit more energy than LEDs, leading to faster flowering.
Even if you’d like to grow more than a few plants, you don’t have to go for the more expensive HID lights. Simply add to your setup with either a few larger LED bulbs or several of the smaller ones. If you opt to go for the latter option, make sure that your plants and your lights are spaced out correctly, as you want to make sure that each plant gets adequate amounts of light. Using too few lights can cause stretching, whereas using too many lights leaves you at the risk of light burn, as well as energy overconsumption.
The benefits of using LED cannabis grow lights are many. The next big question is how to grow marijuana using only LED lights. A good rule of thumb is one light per every 1.5 square feet. This generally will yield you up to 6 ounces per plant, which ends up covering what you spend on the light and will definitely end up saving you money in the long run. If you are growing only 1-2 plants, our single 75 watts LED light supplies plenty of light for your plants.
With LEDs, you don’t have to place your plants as far away as you would with HIDs. Keep lights below 300 watts about 30-70cm away, or just around 12-27 inches. Lights above 300 watts should be kept at 70-80cm away, while gradually decreasing space when flowering. Larger wattage like 450 should be close to 80 cm or 31 inches.
Start Growing with LED Lights
Not only are LED lights more energy-efficient , but you’ll also save on water usage as well. As you are now aware, HID lights use a lot of energy, which in turn produces more heat. This dramatically increases the temperature of the grow room, causing your plants to consume more water. Cannabis is already quite the water hog when compared to other plants and growing even just a small amount of plants uses a lot of water. Any way to reduce water consumption is great for the environment, not to mention great for your utility bill.
There are many reasons to use LED lights when growing cannabis.
Though they work exceptionally well, HID lights are not without issues. For instance, a good setup is very expensive. If your plants don’t produce to your liking, you could find yourself out a few hundred dollars with no way to make your money back.
It used to be that lighting was one of the most expensive aspects of growing marijuana. A good set of HID or CFS lights could set you back a couple hundred with all the required equipment. Now, thanks to LED lights , cannabis grow lights are much more affordable, making growing cannabis at home much more attainable.
Those who could not afford a good set of HID lights would resort to CFLs, which, while not as effective during the flowering phase , managed to get the job done most of the time. Often times, these were the only options for growers with smaller operations, or those growing a couple plants for personal use. CFLs have gained some popularity over the years, but they would never be as popular as HID lights, which are trusted by growers all over the world. That is until LED lights entered the picture.
Not Protecting and Maintaining the LED Lights
LED grow lights are your friend and an important investment, so you need to take proper care of them. They bring numerous benefits to the growing process and a little maintenance and preparation can save you a lot of trouble. It is recommended that you set up a power stabilizer and connect it to the lights in order to equalize the incoming voltage, thus protecting the chip inside the LEDs.
Forgetting to Adjust the Lights
Many people forget to adjust the height of the lights as the plants grow bigger and end up with burnt leaves. Another important thing is to occasionally rotate the pots in order to prevent the plants from leaning towards the light too much.
Using the Wrong Light Schedule
You should be careful not to leave the lights on all the time, or worse, the opposite – forget to turn them on. It might sound trivial but it’s quite easy to mess up the light schedule and even a minor change might have a negative impact the plant’s growth. Cannabis needs about 18-24 hours of light during the vegetative stage and 12 hours of light during the flowering stage.
Not Considering the Other Factors
LED grow lights are a great aid when growing plants indoors but by themselves they cannot do much. In order to produce big and healthy yields there are a lot of factors that need to be considered – room temperature, airflow circulation, soil, nutrients, plant genetics, and many others things. Don’t just focus on a single part of the growing process. Instead, try to get an overall understanding of the whole chain and how everything is interconnected.
Setting the Lamps at an Improper Distance
Overheating or insufficient lighting can result from having too many or not enough lights, but it can also result from placing the lights too close or too far from the plants. There is no universal rule for setting the distance but it’s recommended that LEDs are placed 12 to 18 inches away from the plants.
These issues can be related to improper usage of lighting. (The same issues affect other types of plants as well.) Grow lights are a great tool for making the growing process more efficient, but they can also be harmful to the plant if not used correctly.
Source: Maximum Yield, May 31, 2019
Grow lights are a great tool for making the growing process more efficient, but they can also be harmful to the plant if not used correctly. Here are 10 things you should avoid doing when using LED and other types of grow lights.
In this article, we’ll provide you with the 10 most common things you should pay attention to when using LED grow lights so you can grow healthy looking plants and avoid any unnecessary hassle. This information is extremely relevant to beginners.
Continue to increase your light intensity until you’ve reached the vegetative intensity level. The ideal light intensity for vegetative growth is 400-600 μmol·m −2 ·s −1 . Once your light intensity has reached the level you want for veg and your plants are happy, let them veg away!
If you grow young plants under T5 fluorescent or metal halide lights in propagation, the first step in the transition to the vegetative phase is to acclimate your plants to the enriched spectrum of LEDs. This is a relatively quick process, taking only one to two days. During this step, match the light intensity of your LEDs in your vegetative rooms with that of the propagation room. This step is only to transition to the new spectrum. All other environmental variables remain the same.
If you don’t know your propagation area’s light intensity, you’ll need to take light measurements for this step.
STEP 3: Repeat Until Ideal Light Intensity Reached
If you’re switching from a LED propagation environment to a LED veg environment, you won’t need to worry as much about this step.
Full-spectrum quantum-sensor light meters measure light differently than meters that measure lumens or footcandles. Light intensity measurements of lumens or footcandles will significantly understate PPFD intensity. This is because they measure the light intensity based on how humans perceive visible light.
After your plants have acclimated to the LED spectrum, you can begin gradually increasing light intensity by 50% every 1-2 days. This allows for a gradual but timely transition. If you are growing more sensitive cultivars, you can increase the light intensity as slowly as every 7 days. If you are growing hardier cultivars, you can increase light intensity more quickly to complete the transition faster.
STEP 1: Transition to LED Spectrum
You can set up a Spectral Control Program to test these ratios with the smartPAR TM wireless control system.
Each time you increase the light intensity, review the environmental settings and plants’ responses regularly. Gradually transition the other growing area conditions and settings to vegetative levels. If you spot anything of concern, slow down the transition period to minimize stress on your plants. Each transition period can be as long as 7 days.