Anti-ligature luminaires are designed to prevent people from self-harming.
Anti-ligature luminaires are mainly used where people are considered “at risk” such as in prison or a secure healthcare facility. There are generally no moving or protruding parts. Rounded or bevelled corners also prevent points where something can be attached. This means there is no ligature points or attachment areas that could enable a luminaire to be used for self-harming.
For example, in the UK “safer cell” prison applications require anti-ligature luminaires to be specified. The UK Ministry of Justice (MoJ) standards state that “the luminaires must be designed so as to reduce the potential for a prisoner to attach a ligature in order to attempt suicide”. We achieve this by minimising the aperture between the luminaire’s diffuser and body, using tamper proof screws and designing the body to be suitable for the application of anti-pick mastic during installation.
Watch our anti-ligature testing process to discover how our tests are conducted to ensure the durability and safety of our products for service users in custodial or secure health environments.
The anatomy of an anti-ligature product
A. An anti-ligature luminaire is designed to minimise the aperture between the diffuser and body.
B. A high impact resistant diffuser should be secured by Resistorx screws ensuring no parts can be removed to be weaponised.
C. A removeable gear tray allows for easy upgrade and maintenance without the need to disturb the anti-pick mastic.
D. A robust material body is strong and durable. An oven-baked finish provides a protective skin of tough polyester paint.
Design and testing
We design an anti-ligature light fitting by minimising the aperture between the luminaire’s diffuser and body. We then conduct specific tests at the design stage. This includes determining the degree of slope a 20 kg weight attached to a galvanised suspension cable, of differing widths, will slide off a luminaire at different angles of incline.
Utilising tamper proof screws and designing the body to be suitable for the application of anti-pick mastic during installation prevents the lighting from being breached or even used as a weapon.
Some of our secure health luminaires, depending on the application, are designed to meet the requirements of “Design in Mental Health Network’s (DiMHN) Testing Guidance for Products in Mental Health Facilities” rating LIG5-5/ES2. In addition 95% of our secure health luminaires are designed to be disassembled and reinstated to ensure maintenance can be undertaken quickly and easily after anti-pick mastic application.