Fig. 1From: Layering contrasting photoselective filters improves the simulation of foliar shadePhotoselective filters used in previous research do not simulate foliar shade well. A A generalized spectral photon distribution (SPD) of sun and foliar shade (left and right y-axes are scaled differently to represent differences in light intensity while maintaining visible differences in spectral quality). B SPD of LEE Filters Peacock blue filter used by Runkle and Heins [42] (figure modified from Petrella and Watkins [48]). C SPD of LEE Filters Dark green filter used by [35] (figure modified from [48]). D SPD of a Mitsubishi blue polyethylene filter used by Petrella and Watkins [40] and Studzinska et al. [44] (figure modified from Petrella and Watkins [40]). Red bars indicate 400 and 700Â nm, respectively, designating photosynthetically active radiation (PAR) between the red barsBack to article page