Ultrabright blue led,dazzlingly bright with an angle of 20 degrees,leds provide a very energy efficient means of providing lighting,in fact each led consumes just 20 - 30 milliamps,compare that with a 12v 10watt cabin light which demands 900milliamps,these leds are supplied with resistors so they can be used with 12volt batteries although they will work with battery packs of 3-4 volts without a resistor,great for use in alarms and other applications where high visibily blue lighting is required,price includes vat and delivery.