The Brook 2 LED bulkhead can be used either externally or internally owing to its IP65 rating. It has rear, end and side cable entry on the fitting and a hinged gear tray for easy installation. For further features, this model also comes with a self-test option meaning it will alert you if it detects a problem in the battery or light. Specification Cut out dimensions for bezel: 83mm (H) 337mm (W) Light source: LED (20 in unit) Lumen output: 320 lm (210 lm emergency mode) IP Rating: IP65 Maintained or non-maintained 3 hour emergency backup Compliance: BS EN 60598-2-22 and other relevant standards