Still trying to design my LED light through clear understanding and not just mimicking.

There is one photosynthetic response curve that shows yellow light has more effect than blue light and that green, while lower, is almost as useful.

Other articles say green light may stunt plant growth and that yellow is not much more useful (despite the huge success of HPS).

Then there is the photosynthesis action spectrum showing that violet/purple light (400nm) has the highest absorption peak followed by deep read at 670nm with a huge dip in green and yellow - yet almost all LED mfgs stress a huge red to blue ratio.

Then there is the chlorophyll absorption graphs with multiple peaks and lesser carotenoid absorption peaks. (Seems this may be due to invitro rather than adult plant testing).

Then there are articles stressing the importance of balanced and 'correct' spectrum (CMH) and others stressing sheer photonic output (as seems to be the case with HPS). Another case is where a standard fluoro outperformed a plant grow fluoro due to higher photonic output. (Pardon if that is the inaccurate scientific descriptor).

I have read and studied many hundreds of pages on the internet and at the local library and while I have gained some understanding am in some ways more confused than when I started.

Is this merely a case of totally different aspects of plant physiology (or different plants) being studied or is it a case of incomplete information?
RackitMan Reviewed by RackitMan on . Drowning in conflicting plant graphs - help! (LED) Still trying to design my LED light through clear understanding and not just mimicking. There is one photosynthetic response curve that shows yellow light has more effect than blue light and that green, while lower, is almost as useful. Other articles say green light may stunt plant growth and that yellow is not much more useful (despite the huge success of HPS). Then there is the photosynthesis action spectrum showing that violet/purple light (400nm) has the highest absorption peak Rating: 5