Conforms to BS EN 12352. Outstanding performance super bright synchronised LED with additional low intensity back light. Polyethylene one piece body provides a high degree of toughness even at low temperatures. Tough, high impact polycarbonate unidirectional lens is designed for maximum light output and incorporates a retro-reflective ring. Designed for quick and easy deployment. Internally mounted on/off switch which is automatically activated when placed on to a cone and de-activated on removal from the cone Efficient and reliable integrated circuit. Over 100 lamps may be placed in line, spacing min 2.2M max 10M. Deploy in any order as there is no master or slave. Meets DFT specification for use on motorways and trunk roads on leading tapers.