LED ceiling spotlight 7W warm white 12261073

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 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.