BRUMBERG Tirrel-S recessed spot angular aluminium

The ratio of luminous flux (in lumens) produced by a light source to the electrical power it consumes, expressed as lumens per watt (lm/W). It indicates how efficiently the source converts electricity into visible light and allows comparison across different lighting technologies.

The type of material used to construct the outer cover or shell of a product, such as metal, plastic, resin, wood, or composite blends. This attribute helps users understand durability, weight, appearance, and suitability for specific applications.

The electrical potential difference that a product is designed to accept from its power source, expressed in volts (V). It represents the typical operating voltage for the device and helps users verify compatibility with local mains or battery supplies.

The version identifier of the product or its main component, expressed as a string that may include numbers, periods, letters, or descriptive labels (e.g., "3.0", "GX5.3", "Full Version"). It indicates the specific release or build used and helps users determine compatibility with accessories, firmware updates, or related products.