Customer service from briksmax the company it’s self brilliant, I emailed them to tell them I was missing a part they responding very quickly and the missing part was delivered in less than two weeks. The lights themselves are brilliant, and very bright when using the USB port, they can be a little fiddly though, when placing the wires between the Lego bricks, so would advice putting more time aside than you’ll think you need. Overall adding lights to any Lego will bring your Lego to life. Highly recommend this company Briksmax as they have options to add more lights and really customise your Lego world, to just how you like it, will be ordering other lights from them as well.