Patented new construction featuring the Sylvania Wound Ignition Antenna for the ultimate starting reliability throughout lamp life Exclusive frameless construction delivers superior system efficiency and improves lumen maintenance over life Exceptional reliability offering 4 years service with over 95% lumen maintenance Super versions with high xenon pressure boost luminous efficacy up to 150 lm/W Offers increased lighting levels and an extended maintenance-free service life in all road and industrial applications