ok here is the science to the color of light you throw at your plant, blue+yellow make green, this means that a true green plant reflects equally blue and yellow light, however a light green leaf is reflecting more yellow light, this means that the plant is currently absorbing more in the blue spectrum than in the yellow,
now if you have a true green leaf, then most of the light absorbed will be red,
take a color wheel and compare your the color of your leaf to it, the opposing color is the most absorbed frequency of light, therefore the most productive, and yes this is red, but as you get darker greens and purples in your leaf, you will see that the specific frequency of light moves from true red.
so in the early stages of growth the plant will be a light green so its using more blue light but as the leaves darken, the plant is thirsting for that yellow-orange spectrum,
red light is constantly absorbed by the plant, blue light is an important part of the early stages of growth,
so just look at the plants you have and how they change as they age, and you will figure out the best light for your strain,
I bought my MH warm deluxe specifically because it can be used for the full cycle, but I am going to be broadening my spectrums with more lights as I build my setup, but basically seedlings like MH blue spectrum light, middle life growth really needs full spectrum blue to red, and when you start to flower the plant is gonna want more red, but still uses blue-green to some extent. though the blue specifically is reduced severely in its absorption to the leaf,
so yeah mh or hps all the way through works, but Ill bet you your crop if you supply light in a manner similar to that which I have mentioned above, yo will increase your crop.
im gonna post this in its own thread just cause i havent seen anyone explain this yet,
