CLASSIC CHRISTMAS LIGHTS – This set of warm white cluster chaser Christmas lights provide all the colourful illumination you need to decorate your home this festive season! ENERGY EFFICIENT - These electrical Christmas cluster lights won't cost a fortune to run, and based on the October energy price cap of 34p p/kWh will cost you around 0.0041p per hour, which equates to just 17 pence per week, based on the lights being left on for a full 6 hours a night! INDOOR/OUTDOOR LIGHTS – These multi-functional cluster Christmas lights are perfect for both indoor and outdoor use. Decorate your Christmas tree, living rooms & outside spaces with ease. 8 SEPARATE LIGHT EFFECTS – Choose from Combination, Sequential, Chaser Flashing, Twinkle Flashing, Waves, Slow Glow, Slow Fade and Steady On to create the perfect festive ambience to suit your needs. MAINS OPERATED – These festive Christmas lights are mains operated, and feature a 10-metre gap between the power source and the 13.9 metres of LED lights. If the lights are to be used outdoors for safety the transformer and power box need to remain protected indoors at all times.