Metal halide lamps with ceramic technology for enclosed luminaires. Product features: White light due to POWERBALL® ceramic technology. Light color: warm white (830 WDL). Extended service lifetime: 4 years (at approx. 11 h/day). Very high luminous efficacy: up to 125 lm/W. Lamp survival factor: 95 % after 16,000 h burning time. Average lifetime: up to 24,000 h. ErP compliant according to EU Regulation 245/2009. Dimmable on conventional control gears and electronic control gears. Product benefits: Up to 15 % higher lumen maintenance factor compared to HCI-TT standard lamps. Up to 30 % higher lum. efficacy for lamps ≤ 100 W (comp. to NAV-T Super 4Y/6Y). Good color rendering. Operation in existing HPS installations as ignition voltage of IEC 60662 is met. Energy savings of up to 70 % when replacing mercury vapor lamps (HQL). Optimum energy efficiency on POWERTRONIC® PTo 3DIM ECGs. UV values significantly below the maximum permitted thresholds to IEC 61167 thanks to UV filter. Areas of application: Streets. Outdoor lighting. Industrial installations. Exhibition halls and trade fairs. Approved only for use in enclosed luminaires. Outdoor applications only in suitable luminaires.