Originally had two pack of lights, and where as the one I set up was working great the other one was faulty, and so I contacted the seller who promptly replied asking for details on the 1 no faulty unit, and after 2 emails explaining the faults, it was acknowledged, and within a few days the seller sent me a replacement which is working fine.
Good seller, quick to email back and very good product. Mention to Sarah who answered my emails professionally and speedily
Would highly recommended