Greenhouse PAR Lighting Requirements

[gepman]

Does anyone know of any good references for PAR lighting requirements for different plants, photoperiod requirements for different plants, and general technical references on greenhouse lighting? I am particularly interested in edible plants. This isn't exactly my specialty!

 

[stanlsimon]

The ASHRAE books have data on watts/ area for various species, also hours duration, not sure if it was in fundamentals or systems, have you tried the IES ?