New Mini Bulb Flashers Please Read Description Before Purchasing Check Pictures For Measurement Diagram Only For Use On Strands That Take A 2.5 Volt .425 Watt Bulb Indoor/Outdoor 2 style A 2.5v .425 watt mini light bulb flashers to make your lights flash. You must match the flashers to your replacement bulb voltage and wattage or they will not work. You can remove these from the base to use on any string with the correct voltage and wattage. Please check pictures for a measurement diagram for the style A base. There are many similar styles so please make sure these are the size and wattage you are looking for. Incandescent indoor/outdoor bulbs.