This Hispec 15W Bulkhead has Push fit connectors for a quick and simple installation and Specific LED chip layout to allow for even light distribution. Microwave sensors detect any moving objects (even through think partitions, such as windows, plasterboard walls, doors, etc), so these products are not suitable for installation in areas where movement (e.g. people, objects) could cause unwanted operation of the sensor, including areas subject to vibration. Please note the emergency pack battery life is guaranteed for 2 years. Ideal for both commercial and domestic use.