Red And Blue Wavelenghs of Light Spectrum in LED grow lights?
Red Or Blue?
What do you need?
Red and Blue light is essential for plant growth. It is well known that chlorophyll, which is contained in the green leaves of plants performs photosynthesis. Red and Blue are the wavelengths most essential for photosynthesis. The blue absorption region is 430-450 nm and that of red is 650-670 nm.
Recent research suggests that the ideal balance is 92% red LEDs and 8% blue LEDs. Although the lamps we use have a higher percentage of blue LEDs and they work fine. Blue has a smaller influence than red light so anything between 1% and 20% of blue light can be selected, depending on your plants and their growth requirements. When choosing your lamp you want both colours with the same frequency and relative intensity per LED.
These days most LED Grow Lights only deliver the colors of light used by plants for efficient and healthy growth. By leaving out the wavelenghs plants wont need they provide better energy efficency than conventional grow lights.
Red Light
Red Light is in the vicinity of the first peak of a plants light absorption spectrum (660nm) and it contributes to the plant photosynthesis. Red light, when combined with blue light, encourages flowering. It can also be used in higher doses to stimulate flowering, seeding and fruiting.
Blue Light
Blue light is responsible primarily for vegetative growth (leaf). It is known that chlorophyll has the second distinct absorption peak in the vicinity of blue light wavelenghs (450nm). The blue light is also indispensable to the morphologically healthy growth plant. There is also more sunlight energy in the blue-green wavelenghs.