powerstar x16A series are cylinder led track light design with internal driver simple &generous. the housing with good convection from front to back to promise good heatsink. also the simple design can save lots of shipping cost .power from 7W to 35W (500-5000lm) to replace halogen 35w 50w and heavy metal halid 35W,70W perferctly .the series led track lighting adopt world class driver and brand chip to promise super quality and efficient. the reflector use high efficient 98% transparent to get 150lm/w and top class low UGR reflector to make sure UGR less than 15. finally any kinds of optics can reach light spread well