[Please note that ONLY LED light set. All LEGO sets showed in images and videos are not included. Designed for Lego 21034with this light kit you can bring your Architecture London Skyline Collection from dark to bright make it come to life. Package contains dot lights strip light expansion boards connecting cables battery holder(batteries not included) adhesive squares and instruction. With a step-by-step instruction you will find an easier way to make a huge upgrade to your favorite building kit. If you have difficulties with your product please send us an email we are always here for assistance.]