LEDLightingSystemforRollingStock-HitachiGlobal.pdfVIP

Hitachi Review Vol. 61 (2012), No. 7 301 LED Lighting System for Rolling Stock Isao Ishii OVERVIEW: With energy efficiency becoming increasingly important in Fumio Shimada recent years, demand is growing for the adoption of LED lighting as a Mitsuru Asahara replacement for fluorescent interior lighting in passenger trains. Rather than simply replace fluorescents with LED lighting, Hitachi has drawn Shigenori Iwamura on its experience and past activities as a manufacturer of rolling stock to achieve power savings of 40 to 60% while also taking account of interior design considerations and the color of the light. Hitachi has also succeeded in approximately halving life cycle costs compared to existing general- purpose LED lighting through measures that include adopting a dedicated power supply and designing long-life circuits. In the future, Hitachi intends to continue development with the aim of adopting LEDs for train headlights and other lighting with systems that further enhance the functions of LED lighting for passenger train interiors. INTRODUCTION PURPOSE AND FEATURES OF LED SINCE 1997, Hitachi has been developing and LIGHTING marketing its A-train rolling stock based on its Fea