Check the listing for details. Arri Studio Cool 4, Four Tube Fluorescent Light Unit. Condition: Used. Listed at 199.00 USD. Arri Studio Cool 4, Four Tube Fluorescent Light Unit, Non-Dimming, Stand Model, 220 Watt, 120 Volts AC. ARRI goes "Cool" with the Arri Studio Cool Series. Arri introduces the most flexible studio fluorescent lighting available. The design utilizes the latest lamp and reflector technology. A single STUDIO COOL lamphead will accommodate standard 55 Watt tubes. In addition, the reflectors are interchangeable. Designers can select either the wide, soft 120 degree half-peak angle reflector or when more punch is required the tighter 90 degree half-peak angle reflector can be installed quickly and easily. The rugged aluminum extrusion housing features a detachable ballast / electronics module for ease of service and maintenance.ARRI Studio Cool 4 FeaturesInternal Ballast.Weight: Approximately 18.7 lbs., 8.5 kg.Dimensions: Approximately 29.5" x 19" x 10.6", 75 cm x 48 cm x 27 cm