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. 2019 Jan 25;14(1):e0209973. doi: 10.1371/journal.pone.0209973

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© 2019 Coutand et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 2 — A: 3D quoted scheme of the isotropic light device. B: View of one hemisphere showing the turtle pattern of circular neon tubes at the periphery of the white plastic hemisphere. C: View of one hemisphere covered with metallic plates to concentrate the lighting towards the inside of the hemisphere. D: Measurements of PAR and blue radiation in the two spheres in 46 directions with an optic fiber mounted on a robot set in the center of the sphere. Black symbols: PAR; blue symbols: blue radiation.