OL-S04 (with battery box): mobile operating light Intensity: 4,000 Lux Color Temp.: 4,000?00 K Illuminate Field: Ф100-200 mm Vertical Adjustment: 400 mm Lamp-head Diameter: Ф500 mm Bulb: 24/25 (v/w) Battery box is optional for standing type, make 'moveable and rechargeable'. (Re-chargeable battery should be prepared by the users.)