Fig. 4From: “They can rest at home”: an observational study of patients’ quality of sleep in an Australian hospitalMean luminance levels recorded per monitoring location. Legend: Exposure to light over the monitoring period displayed a consistent pattern of higher artificial light levels between 22:00 h to 24:00 and again from 05:00 h to 07:00 h. This is consistent with the changeover of staff between the shifts and increased clinical activityBack to article page