This light set consists of 240 LED warm white chasers and is suitable for both indoor and outdoor use. It is important to note, however, that the transformer must be plugged into an indoor mains supply and not in damp conditions. The control box should also be placed indoors. This set comes with non-replaceable LED bulbs and is equipped with an IP44 31V BS 3.6W transformer. Please only use this transformer or an equivalent one. Compliant with BS EN 61 55B-2-6, it features an 8 function controller with 8cm spacing and is approximately 5m in length.