specific or distributed lighting spectrum

If someone knows the answer to this, it would be great--but i guess i'm willing to settle for opinions

given the idea that plants use chlorophyll A and B, which peak at different frequencies, would it be more better for the plant if light was specifically oriented to 1 peak (say chlorophyll a or b in blue) or would the plant like that same amount of light was divided by 2 and applied to both peaks.

i.e., 100% light at chl. A peak
or 50% peak A 50% peak B

I wonder where this will go....

A&B work together, there is also C, but it makes only .5% of all. A&B cover the red and blue spec of light and absorb this to gain electrons to basically build from ADP ATP, of course this is a bit more complex then this.

attually both, A&B, cover about the same spec as you can see in this graphic i found on wiki
Chlorophyll - Wikipedia, the free encyclopedia
the article will give you a damn good idea of what is going one