Fig. 3
From: Ultra-light photosensor collars to monitor Arctic lemming activity
Example of light intensities (lux) recorded by a photosensitive collar equipped on a brown lemming individual on Bylot Island, NU, Canada. Above: continuous light intensity (Lux) on a logarithmic scale over time, with the threshold fixed at 240 lx (dotted line) that separate states of the lemming being inside or outside its burrow. Long periods without changes in lux (flat horizontal lines) indicate no transitions and that the rodent is constantly in darkness. Below: state of lemming being either inside or outside a burrow derived from the recorded light intensity threshold