LED Repair Grow Light
Plants need blue light to tell them where the sun is, and red light to provide energy for their metabolism. Combining the two colors creates grow lamps.
absorption spectrum of the photosynthesis substances. They need blue and red light, not in the same amount though.
For green plants the lighting peaks that are most important:
Chlorophyll-a: 430nm/662nm
Chlorophyll-b: 453nm/642nm
Carotenoids: 449nm/475nm
Red pigmented plants use more light in the blue area of the spectrum.
Lighting for a growing plants should not be chosen on color temp alone. It is true that 'full spectrum' bulbs are referred to as bulbs between 5000 Kelvin (K) and 6500 K and are considered to be best for plants. Yet this does not indicate what wavelength in nanometers the bulb is actually emitting. If you want to optimize plant leaf development (blue light) and stem elongation and color (red light) you need light in both the blue and red spectra for photosynthesis. You need a mix of blue and red for your plants, and green for you (brightness as perceived by humans). If your lighting looks extremely bright and your plants seem ultra-green, it means that you have lighting that outputs strongly in the green spectrum. Do not equate this with good lighting for your plants, because plants don't use light in the green spectrum for photosynthesis. Sunlight peaks in the blue spectrum at 475 nanometers (nm). This is a shorter wavelength than red light and is used by both plants and algae. As light passes through water the intensity decreases. The shorter wavelength blue light penetrates water better and more quickly than red, which is slower and absorbed more quickly. Chlorophyll, the photosynthetic pigment used by plants traps blue and red light but is more efficient with red light at 650 – 675nm. (source)
LED color is determined by the semiconductor used, the band gap voltage of that conductor specifically. There are only a few specific band gap voltages that are produced, and they create very specific light frequencies. The white LEDs are actually UV LEDs with phosporesence on top, and it depends on the quality of that material (that converts high frequency UV into lower frequencies that combine into white) what the actual spectrum is. It may be more difficult to find a correct white led than to combine red and bleu. For plants it does not matter, as long as it gets the photons it needs.
We can give you a quote for a custom growlamp at LedRepair
Links
ledgrowthTop Led Growlights
Growlight outlet
Quantum LED
Growlightexpress
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