Which color causes the most cannabis growth? 420 Guide 2020 Updated
What is the Color Spectrum of Light?
Although natural light might appear white to us, it is actually made up of many different colors. You can see this in action when you put light through a prism, or if you catch the sight of a rainbow. When light is refracted into its individual parts, you can see all the colors that make up that light!
Over the years, we’ve learned that plants actually make “decisions” about how to grow based on the spectrum of light they receive. A different color spectrum can change how cannabis germinates, grows and even makes buds! Although we don’t have a lot of options to change the spectrum of sunlight when growing outdoors, we have almost complete control of the spectrum when growing cannabis indoors since we’re using grow lights for weed!
Blue for Vegetative
Most people use blue lights during the vegetative stage. This will encourage the cannabis plant to be short and squat and to have large, healthy leaves.
Indoor growers will typically use compact fluorescent lamps, T5/T8 lighting fixtures, or metal halide bulbs during the first several weeks. This encourages the plants to stay compact.
Red for Flowering
Most people use red or yellow grow lights that have higher ratios of red during the flowering stage. This helps encourage the plants to promote budding and grow tall. It is also possible for plants to get into the flowering stage more quickly if you use red light compared.
Green Light and Seed Germination
Green light mediates seed germination in some species. Seeds use green light to evaluate whether the environment is good for growing. If a seed germinates in a shady spot, it can be detrimental to the plant because it will not get enough light to grow. A seed that senses a shaded environment may avoid these adverse conditions by staying dormant and not germinating1. Shade environments are enriched in green relative to red and blue light.
Cirrus Titan T250 /T500 COB LED Grow Light
The T500 is about equivalent to a 1000w hps grow light, but most first-time LED growers will probably get lower yields than they did with HPS. Much of that is due to the differences in growing with HPS light and with LED light.
Once you've gotten used to the differences, you can expect yields well above those of a 1000 watt HPS bulb. More importantly, the quality will be much higher, with an increase in resin production of up to 20%.
Cirrus' Leaf app lets you control the spectrum (or choose one of the many presets) from your smartphone or tablet. You can control the brightness of each part of the spectrum. If you want to turn off UV light and turn down the reds during vegging, you can do that. If you want to have the UV light come on for only two hours every afternoon, you can do that, too.
Lighting Science VividGro V2 Grow Fixture
The VividGro 2’s performance-engineered, broad color spectrum can significantly stimulate plant growth while drastically reducing energy consumption by utilizing specific lighting wavelengths - at 450 and 660 nanometers.
The V2 Fixture has a rated life of 60,000 hours (L70), far longer than conventional high-pressure sodium (HPS) or other HID lamps, and significantly more than the life of many competing LED fixtures. Since VividGro™ V2 uses only 588 watts, far less energy than standard HPS fixtures, which typically use 1000 watts, the energy savings are dramatic.
This is by no means a complete list. But we have done our best to hand-pick the best and proven LED lights for growing on the market. Whatever choices you make, we believe you'll enjoy large results with your indoor garden.
Although natural light might appear white to us, it is actually made up of many different colors. You can see this in action when you put light through a prism, or if you catch the sight of a rainbow. When light is refracted into its individual parts, you can see all the colors that make up that light!
Over the years, we’ve learned that plants actually make “decisions” about how to grow based on the spectrum of light they receive. A different color spectrum can change how cannabis germinates, grows and even makes buds! Although we don’t have a lot of options to change the spectrum of sunlight when growing outdoors, we have almost complete control of the spectrum when growing cannabis indoors since we’re using grow lights for weed!
Blue for Vegetative
Most people use blue lights during the vegetative stage. This will encourage the cannabis plant to be short and squat and to have large, healthy leaves.
Indoor growers will typically use compact fluorescent lamps, T5/T8 lighting fixtures, or metal halide bulbs during the first several weeks. This encourages the plants to stay compact.
Red for Flowering
Most people use red or yellow grow lights that have higher ratios of red during the flowering stage. This helps encourage the plants to promote budding and grow tall. It is also possible for plants to get into the flowering stage more quickly if you use red light compared.
Green Light and Seed Germination
Green light mediates seed germination in some species. Seeds use green light to evaluate whether the environment is good for growing. If a seed germinates in a shady spot, it can be detrimental to the plant because it will not get enough light to grow. A seed that senses a shaded environment may avoid these adverse conditions by staying dormant and not germinating1. Shade environments are enriched in green relative to red and blue light.
Cirrus Titan T250 /T500 COB LED Grow Light
The T500 is about equivalent to a 1000w hps grow light, but most first-time LED growers will probably get lower yields than they did with HPS. Much of that is due to the differences in growing with HPS light and with LED light.
Once you've gotten used to the differences, you can expect yields well above those of a 1000 watt HPS bulb. More importantly, the quality will be much higher, with an increase in resin production of up to 20%.
Cirrus' Leaf app lets you control the spectrum (or choose one of the many presets) from your smartphone or tablet. You can control the brightness of each part of the spectrum. If you want to turn off UV light and turn down the reds during vegging, you can do that. If you want to have the UV light come on for only two hours every afternoon, you can do that, too.
Lighting Science VividGro V2 Grow Fixture
The VividGro 2’s performance-engineered, broad color spectrum can significantly stimulate plant growth while drastically reducing energy consumption by utilizing specific lighting wavelengths - at 450 and 660 nanometers.
The V2 Fixture has a rated life of 60,000 hours (L70), far longer than conventional high-pressure sodium (HPS) or other HID lamps, and significantly more than the life of many competing LED fixtures. Since VividGro™ V2 uses only 588 watts, far less energy than standard HPS fixtures, which typically use 1000 watts, the energy savings are dramatic.
This is by no means a complete list. But we have done our best to hand-pick the best and proven LED lights for growing on the market. Whatever choices you make, we believe you'll enjoy large results with your indoor garden.
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