Track System - Compatible with H type 3-wire-1 circuit track system and Halo light circuit (Track not included).If you need J-type track connnctor or L-type track connnctor,please contact me by email,we can change it to you for free. Product Dimensions - 7.5"/19cm (Diameter) x 9.65"/24.5cm (Height), Standard cord length is 31.5"/80cm.We provide custom service,it is for free to customize a cord length withn 59"/150cm in the base of the original cord length,please contact us if you need a longer or a shorter cord length. Bulb Requirement - Suitable for any E26 Socket base bulb,40W max（Bulb not Included).Different bulb have a diffferent look,you can choose bulb type according to the environment and occasion. Easy to install - The connector at the top of the cable lock in to H-Type track lighting system with a 90 degree turn to lock it in place. Wide Application: A track lighting system is a great way to brighten any room, be it your kitchen,coffee shop,farmhouse,bar or garage.A hollowed-out metal lampshade can give you more lighting space. Warm Tip: We provide friendly service,please feel free to contact us anytime if you have any questions anout our lights. Thank you!