10 Replacement LED Light Bulbs Check Pictures For A Base Measurement Diagram, L1 Base 3.4 Volt, 0.068 Watt Bulbs 10 Clear LED replacement bulbs, cool white. Replacement Mini Bulb Indoor/outdoor Christmas tree lights. New bulbs with a white base, other colors are listed. These bulbs are 3.4 Volt .068 Watt. Please check pictures for a base style measurement diagram, there are many different base styles so please check measurements, voltage and wattage before buying. Will only work in an LED string with the proper voltage and wattage.