powerstar X16I series led track lighting are designed with intrack driver adaptor with track rails compatible perfectly.it looks simple and generas.The power is easy to change by hand, easy maitainencem easy to change power by only dip it. good convection of housing keep led chip very safe and quality promised.power from 20-35W with high efficient and low UGR. brand chip&driver is stardard to promise 5years warranty.