How Many Led watts for 4×4 Grow Tent

What Are LED Grow Lights and How Do They Work?

How Many Led watts for 4×4 Grow Tent |

What Are LED Grow Lights and How Do They Work? 

A LED light emits visible and invisible wavelengths of light (UV rays and infrared rays) to promote plant development in an indoor environment. They emit beams that are identical to those of the sun. 

Before we get into how the finest LED grow lights will help your marijuana plant develop, it’s important to understand what kind of light a plant requires to thrive. 

Blue light absorbs more in marijuana plants than other light colours. Rapid plant growth is induced by the blue lights. And it largely demands green or red light for germination and blooming. UV and infrared radiation are present in LED grow lights. So, if you want your plant to grow, you can choose UV blue.

Overall, with the best LED grow lights, adjusting the wavelength of light to meet the needs of the plants is simple. 

The plant’s vegetative phase is aided by UV rays. This is due to the fact that this wave length accelerates cell division, resulting in rapid plant growth. In the same way, IR rays are used throughout the flowering period. They are swiftly absorbed by the plant’s buds and tips, helping it to bloom quickly. 

We propose choosing a superior LED grow light with wavelength options. It allows you to change the lighting to meet the needs of your plants.

Calculating LED grow light wattage requirements per square foot 

LED grow lights feature the highest PAR and the longest lifespan of any artificial light. A typical LED light lasts 10,000 hours. To extend the life of the lights, several businesses turn them off while they are not in use. Some lights will be labelled as 5 watts but only use 3 watts. However, since we’ll be highlighting the average demand per square foot, this shouldn’t be an issue when calculating how many watts per square foot of LED grow lights.

For a 10 square foot grow area, 400 watts is usually enough. For LED grow lights, the average wattage requirement per foot is 30-50 watts. This isn’t the case with all LED grow lights, as some are more energy efficient and consume fewer watts for the same amount of light. The average standard is 40-50 watts. 

What Should You Look for in a 4 × 4 Grow Tent LED Light? 

LED lighting that has been carefully calculated provides the right balance of light to support and manage the plant’s photosynthesis. 

What are you cultivating? 

The type of plant you want to grow is the first thing you should think about. This is because LED grow lights are designed with the type of growth in mind. If you’re a hobbyist, simple and inexpensive designs can suffice. Commercial growers, on the other hand, require UL or ETL-certified LED lights. 

What kind of light does your plant need? The lighter your plant becomes, the better. However, there will come a time when your plant will no longer require more light. A condition known as light saturation point is created when there is too much light. If you expose your plant to too much light (beyond its saturation point), it may suffer from poor growth.

Flowering and vegging have different illumination requirements. When opposed to flowering, vegging requires less power and light intensity. The number of watts per square foot is measured in watts per square foot. 

Conventional LED grow lights typically consume 32 watts to illuminate a one-square-foot flowering area. LED grow lights are more energy efficient than HID grow lights. The energy efficiency of LED lights on the market, however, is not the same.

In most cases, an LED light for a 4 × 4 grow tent will use fewer watts to produce the same amount of light as a traditional one. Plants that require low light, such as lettuces and herbs, require 11 to 18 watts per square foot of grow tent space. 

With respect to your grow space, you can increase the wattage. Just keep in mind that one square foot of grow tent space requires approximately 32 watts of real energy. A 4 x 4 takes roughly 512 watts, but the wattage might range from 500 to 650 watts, according to study.

Spectrum of Light 

LEDs, for the most part, produce light with a restricted spectral range. LEDs with peaks at various wavelengths are available, allowing for a wide range of spectra to be created. White light can be created by mixing LEDs of various wavelengths or covering blue LEDs with phosphor. 

For both the initial and second phases of plant growth, these lights are engineered to use the particular wavelengths required for photosynthesis. Plants gain from the use of the red, green, and blue sections of the visible light spectrum, according to research. 

Which spectrum of colours is best for my plants? There are approximately fourteen wavelengths in total. Infrared, UV, white, violet, blue, and red LEDs are used in the majority of high-end versions. These wavelengths have been designed to perform effectively in both blooming and vegetative plant growth cycles.


Green light is not used in photosynthesis, the process by which green plants convert sunlight into carbohydrates. Because green light reflects off of plants, they seem green. They, on the other hand, have no use for such frequencies. Green leaves absorb a lot of blue and red wavelengths of light. 

A majority of leafing plants require a spectral band that ranges between 400 (purple) and 700 (red) nanometers for photosynthesis. The quantity of light particles, or micromoles per square metre per second, that impact a surface determines the unit of measure for PAR. 

Intensity of light 

You might be wondering how much light to provide your plants on a daily basis. Your plant’s growth stages are determined by the amount of light it receives each day. Intensity of light can be both a gain and a disadvantage. Normally, a certain number of lumens are required to ensure healthy plant development by igniting the photosynthesis process.

How many lumens are sufficient? Well, it depends on, among other things, what you’re cultivating. The first thing you should think about is the size of the marijuana grow tent. 

The most suitable light intensity (lumens) for each square foot should probably be between 300 and 800. 

4 × 4 Grow Tent LED Grow Light Options 

Grow light panels, COB grow lights, and single spot lamps are among the several combinations available. Color balance is one of the many options available to you. The ratio can range from 4:1 to 8:1 with most lights. In terms of hue, it’s a red-to-blue ratio. 

Make sure the manufacturer has indicated the wavelengths, such as 660 nm for red and 460 nm for blue, when testing the colour ratio (red to blue). Bi-band and tri-band LED lights are also available. Bi-band designs may be insufficient; therefore, tri-band designs should be considered. 

In general, pick LED grow lights that are more than 90 watts, preferably 120 watts or more. Most crucial, choose a solution that is appropriate for your plants.