The 458/UNI8 is an eight-channel transistor dimmer module, for leading- or trailing-edge dimming of the majority of load types including Incandescent and dimmable LEDs.

The module has 8 channels that can be individually selected as leading or trailing edge, rated at 6 A each. The module has a DALI Stands for Digital Addressable Lighting Interface. Standardised digital protocol for lighting control, allowing communication between control devices and LIUs (control gear)., SDIM Stands for ‘Serial DIMming communication’. It is a Helvar communication protocol. and DMX Stands for Digital Multiplex. A type of subnet, used mainly for stage lighting and effects control. interface, for integration into DIGIDIM and Imagine systems.