Mains voltage lights with no transformer built with a straight line construction, patented waterproof system and weatherproof fitting system 3 x 20 x 13v 50cm spacing between lamps giving you 2950cm of lights with 300cm of flex between the plug and first bulb giving you 3250cm in total. Spare bubls 13V/3W. These lights are superb and can be left on your tree all year round. Included are 60 Green cable ties to attach your lights securely and also on spare bulb. Please click details for more information.