These 200 led supabrightsandreg can be used indoors and outdoors the plug transformer must be located indoors and as it comes with a generous 8 metres of cable from plug to start of the lights they are easy to set up even when using outdoors. Features 200 warm white leds16m lit length 52.4'clear cable8 hrs on 16 hrs off timer optionmulti action including static most fairy lights come on a green cable, which is great when decorating trees and hedges, but if you want to wrap around mirrors, bedsteads, fireplaces, or anything that isn't green, then clear cable lights will look much better helping to blend the lights in seamlessly. These are multi action lights, so as well as the standard static option there are also various modes, both fast flashing patterns, and then smoother and fading options. Another great benefit of these lights is the in built timer option, meaning you can set the lights to go on and off at the same time each day, allowing you to 'set and forget'. Indoor and outdoortransformer must be plugged indoors8m cable from plug to first light16m lit lengthselv safe extra low voltage