FIG 2.

Fluence rates between 200 and 800 nm (A and C) or between 280 and 400 nm (B and D) outside (black lines) or inside (red lines) the PET bottles used in this study under natural sunlight (A and B) as measured on 27 March 2013 at 2:30 p.m. in Lausanne, Switzerland (46°52′N, 6°57′E), or under the solar simulator (C and D). The internal fluence rate (red lines) was determined by correcting the outside fluence rate (black lines) by the absorbance of the PET bottle (Fig. 1).