Lighting efficiencies

chazbolin said:

Point taken on absolute efficiencies relative to the sun. The order of magnitude may be more in the neighborhood of 1 in 1 billion photons

Click to expand...

Do you have a source for this or do you just mean out of all solar radiation that reaches the surface. I was under the impression the range is inline with what MF posted.

"On the basis of these limitations, the theoretical maximum efficiency of solar energy conversion is approximately 11%. In practice, however, the magnitude of photosynthetic efficiency observed in the field, is further decreased by factors such as poor absorption of sunlight due to its reflection, respiration requirements of photosynthesis and the need for optimal solar radiation levels. The net result being an overall photosynthetic efficiency of between 3 and 6% of total solar radiation."

http://www.fao.org/docrep/w7241e/w7241e05.htm#1.2.1

Still looking for table data for chlorophyll a/b/carotene's. I cannot for the life of me find the data anywhere, but the graphs are everywhere! lol