The ARRI ST1 1000 W Studio Fresnel is a professional tungsten lighting fixture designed for studio or stage use. It supports a 1000 W lamp (standard use), features a 7" (~175 mm) Fresnel lens that delivers a clean, adjustable beam, and is built from extruded/die-cast aluminum for durability and long-term reliability. Key Features Power: up to 1000 watts, operating on 100–240 VAC (50/60 Hz) depending on the version. 7" Fresnel optics (~175 mm diameter) offering a beam angle of approximately 11° to 60° depending on configuration. High-quality construction: extruded/die-cast aluminum housing with a cross-cooling system that reduces operating temperature. Ease of maintenance: simplified access to internal components; lens and housing engineered for heavy-duty use; mounting via baby pin or C-clamp. Included: lamp, connector, C-clamp, safety cable, and barn doors.