Title: Distinct type II opsins in the eye decode light properties for background adaptation and behavioural background preference Authors Gabriel E. Bertolesi Nilakshi Debnath Karen Atkinson-Leadbeater Anna Niedzwiecka Sarah McFarlane Figure 2C Assessment of reflected light (lux) on different grey backgrounds Exp: 2020-9 Grey level #2 RGB Lux average 255 195 249 191 211.67 225 170 213 166 183.00 200 138 174 144 152.00 175 116 140 116 124.00 150 98 118 101 105.67 125 72 85 76 77.67 100 60 66 63 63.00 75 52 60 59 57.00 50 41 46 49 45.33 25 44 45 43 44.00 0 38 36 39 37.67