How does Light Spectrum affect plant growth

✿ Ever since NASA began experimenting with LEDs for growing plants in the 1980s, we have known that different light spectrums have widely varied effects on plants. Some spectrums stimulate vegetative growth and others increase the yield in flowers and fruits.
✿ Choosing the right grow light spectrum for your cannabis cultivation can be a challenge for new growers. HYPHOTONFLUX offers a variety of spectral solutions to meet growers’ needs in optimizing the lighting strategies for any crop at any growth phase or geographic location.
✿ Clone Stages: If you start your cannabis growing from clone stage, your first goal is better rooting. Keeping the light intensity low is important and if your set about 50% blue and 20% red, your plant will focus on energy on deepening roots. ✿ Vegetation Stage: In Vegetation Stage, the top priorities of your cannabis plants should be root growth and tight internodes. Blue light is very important to the beginning of plant growth because it increases the amount of chlorophyll that is formed. High ratio of blue light in vegetation stage can help make plants tougher and keep short. ✿ Pre-flowering Stage: It can take anywhere from 7 to 14 days for a plant to enter the pre-flowering stage. At pre-flowering, we recommend to kick the intensity of red light up just a little, to about 80%. Your blue light concentration can remain right where it was. ✿ Flowering Stage: The peak Flower period is generally from week 3-7 and is the time when the plant (stem/leaf) growth stops and all the plant energy focuses on flower production. Red lights from 640-680nm are most important in the flowering stage. This range of light promotes stem growth and overall plant height. ✿ Ripen Stage: The Ripen period is generally from week 7 to finish (in an 8-week flower) where the Flower growth, (i.e. size) slows and plant energy refocuses on resin and terpene production. This is the period where the flower acquires a significant portion of its density, ie. resin content. In this final stage, the blue light are important as it comes to producing trichomes. ✿ The most common question for new growers is what is the optimum spectrum mix for cannabis?
✿ The answer is depending on what is your priorities are. Because different spectrum mixes promote different morphology in different growth stages, and it is not simply one ideal. For example,if you need your plants produce more trichomes, you need add UVA light during the growth stage. And if you want to speeds up phtochrome conversion, the far-red will help photosynthetic rates.