I start this with the purpose of join on a single thread all the basic information needed to develop and understand how LED lights work and to provide a solid base of what is known at this moment about effects of lights on plants.
There are many crap info about this topic on the net, so im trying to offer some basic solid info wich allows people to discriminate whats the wrong info widely avalaible at the net, wich unfortunatelly is the most.
First off, its important to differenciate between the photosynthesis and other light driven effect of plants.
Photosynthesis is the process by plants transform the light they receive into energy usable for the plant. Its the fuel wich allows the plant to grow, and its tightly related to the amount of
photons wich absorb the plant.
Other effects of light are related to light quality, not to quantity. There are many of this effects, and its important to not forget them, but i let this question to the end. Probably some of this effects will appear when we talk about a photosynthetic issue, but i prefer to concentrate first on phothosynthesis, wich is the main task of light.