red light bulbs for growing weed

Red light bulbs for growing weed

Cannabis is used for many medicinal and recreational purposes. Therefore, many states and countries have legalized its use and cultivation. Countries like the United States of America have allowed the growth of marijuana plants at home. Therefore, cannabis growers need to know about how will the colors of LED grow light affect the growth of their marijuana plants.

Marijuana plants receive a lot of information from the spectrum of light they are exposed to and react to different wavelengths in different ways. For a marijuana plant in the vegetative stage, blue light that ranges from 400 to 500 nm is best. The ideal range is 460 nm, in this stage, the plants are signaled to grow strong, healthy, and large leaves. In the flowering period, red light ranging from 620 to 780 nm can be used for the highest yields. Choosing growing lights colors spectrum of ideal wavelength 660 nm can impact the rate of photosynthesis and plant growth.

It is important to be careful while using UVB supplements. Since every plant reacts differently when exposed to it. In the case of the marijuana plant, it helps in boosting cannabinoid and terpene production, but only when exposed during the last few weeks of the flowering stage. Even it comprises only 1% of UV light, UVB grow lights colors can help increase THC levels. UVB is a great source of vitamin D, which is essential for the well-being of humans. However, prolonged exposure in humans can increase cancer risks. Therefore, growers need to provide the right exposure for their plants while ensuring they stay protected.

Green light for growing cannabis

In this article, you will learn about color spectrums that are needed for marijuana growth. Also, how grow lights colors affect marijuana growth.

Feminized cannabis seeds are important to cannabis cultivation because only female plants produce consumable flowers. LED grow light can boost sustainability and profits in cannabis.

UVB (280-315 nm)

Another benefit of adding green light to your color spectrum is that it does not trigger flowering in marijuana plants. This plant is extremely sensitive to light/dark cycles. Therefore, even small amounts of light during nighttime can trigger marijuana plants into thinking that it’s flowering time. As green light is invisible to cannabis, it is the perfect light color that you can use. That is if you wish to work on your cannabis plants during nighttime.

The energy emitted from the sun is in the form of radiation. The ozone layer filters this radiation and allows only wavelengths from 300-1100 nm to reach plants. This light is referred to as light spectrum, visible spectrum, or color spectrum. Its range is in between 380-750 nm approximately. A spectrum is a band of numerous colors namely red, orange, yellow, green, blue, indigo and violet.

Red light bulbs for growing weed

The red-to-far-red ratio (R: FR) that your plants receive is critical. Based on the red-to-FR ratio, phytochromes help plants know when they’re being shaded by other plants. That’s because plants higher in the canopy absorb red light and mostly pass the FR through.

Robert Emerson discovered this synergistic benefit in the 1950s and is appropriately named the Emerson Effect. The exact mechanisms of the Emerson Effect are unclear, but we know that plants have two photosystems that work in synergy to “pump” electrons and transport energy.

The Science Behind FR Light

At Heliospectra, we believe in moving horticulture forward with better spectral engineering and more efficient products. With all the benefits of FR light, our team recently conducted studies to test the effect of FR in three scenarios.

Far-red (FR) light is light at the furthest edge of the light spectrum, beyond red light, near-infrared. Our human eyes can barely perceive its long wavelength of 700-750 nm. But for plants, FR is very noticeable and quite important.

Far Red and Photosynthesis

The increase in FR during twilight is an important tool that plants use to synchronize their internal clocks. The phytochromes receive a dose of FR photons, and that triggers important gene expressions as the plant enters the nocturnal period. During twilight, the R: FR ratio swings from a red-dominant 1.3 to an FR-dominant 0.6. (2)