The metabo 144 18 volt bsa 144 18 led is a powerful bright and robust site light that provides you with a uniform illumination over a large working area ideal for working in rooms with no natural daylight or on construction sites where there is limited power supply it has two illumination settings max 1800 lumen the light generates minimum heat compared to a common halogen bulb bare unit no battery or charger the site light can be operated with all li power compact plus and extreme battery packs