Good luck in the search, Im on it since 4 years ago.

There are many studies about it, but with limitations. The most known are those written by McCree and Inada, along the 70 and 80's of past century. You can fin the same curves for individual specias and strains of commercial crops in agronomic studies. Differences with the averaged curves are small, anyway.

But these studies all have three main limitations:

-They are measurements of usually sun growth plants performed under not saturating photosynthesis irradiances. Efficacy of each wavelenght has proven to be dependent of the irradiance level, specially on the long term, after plant's acclimatation.

-Plants adapt their photosynthetic systems to both the intensity (irradiance) and light's quality they receive, in order to do the best with it.

-All studies concentrate on the effect of isolated wavelenghts. But its different when plants receive all wavelenght at a time. There are sinergies between wavebands that modulate the response. The most known is the Emerson Effect, that is universal (related to the electron flow between photosystems), but there are many unkown ones that are specie especific. Each plant specie have somewhat different liking in their light's quality preferences.

Photosynthetic response is something that is not fixed at all. If there is something remarkable about plants is their adaptation ability in the way to use resources. And light is their main resource.