MONITORING PLACES OF DETENTION : A PRACTICAL GUIDE FOR NGOS 108 LIGHTING AND VENTILATION Standards “In all places where prisoners are required to live or work: 3 a. the windows shall be large enough to enable the prisoners, inter alia, to read or work by natural light in normal conditions. They shall be so constructed that they can allow the entrance of fresh air except where there is an adequate air conditioning system. Moreover, the windows shall, with due regard to security requirements, present in their size, location and construction as normal an appearance as possible; b. artificial light shall satisfy recognised technical standards.” EPR, Rule 16 “In all places where prisoners are required to live or work, (a) The windows shall be large enough to enable the prisoners to read or work by natural light, and shall be so constructed that they can allow the entrance of fresh air whether or not there is artificial ventilation; (b) Artificial light shall be provided sufficient for the prisoners to read or work without injury to eyesight.” SMR, Rule 11 “The CPT frequently encounters devices, such as metal shutters, slats, or plates fitted to cell windows, which deprive prisoners of access to natural light and prevent fresh air from entering the accommodation. They are a particularly common feature of establishments holding pre-trial prisoners. The CPT fully accepts that specific security measures designed to prevent the risk of collusion and/or criminal activities may well be required in respect of certain prisoners. However, the imposition of measures of this kind should be the exception rather than the rule. This implies that the relevant authorities must