Product benefits: Very high efficiency. Excellent color rendering. Very long lifetime. Very good color stability. UV values significantly below the maximum permitted thresholds to IEC 61167 thanks to UV filter. Product features: POWERBALL© ceramic technology. Light colors: warm white (930 WDL), neutral white (942 NDL). Color rendering index Ra: ? 90. Average lifetime: 20,000 h (operation with ECG with 70…400 Hz square-wave current). Average lifetime: 15,000 h (with magnetic control gear). HCI-T 50 W, HCI-T 35W/942 NDL and 70W/942 NDL only for operation with ECG with 70…400 Hz square-wave current. Areas of application: Shop interiors, shop windows. Shopping arcades. Foyers, reception areas. Museums, exhibitions. Exhibition halls and trade fairs. Factories and workshops. Approved only for use in enclosed luminaires. Outdoor applications only in suitable luminaires.