The Red Color Mini Replacement Christmas Tree Lights come in a pack of 5. The red Light Bulbs are rated for USA 2.5 volts, 200Miliamps. The multi light bulb mini replacements are pre-tested and guaranteed to light. The replacement bulbs fit a mini light bulb socket. Instructions on how to replace the bulbs are included. Each Replacement Christmas Light Bulbs is a long life bulb, cool burning, and the transparent replacement bulbs are USA-UL approved. Replacing Your Mini Light Bulbs 1. Make sure set is unplugged. 2. Pull Mini Light bulb and its base straight out of the socket. 3. If your bulb must be removed from it’s base, straighten out the wires which are at the base and gently pull on the bulb. 4. Insert the new bulb by guiding each of its two wires into its own opening at the bottom of the base. Then, bend each wire upward over the base. 5. Push bulb and base back into the socket, matching grooves so that the bent wires touch the metal plates in the socket. Christmas replacement bulbs safety instructions: Do not use the bulb Christmas light replacements unless the christmas lights are marked suitable for indoor and outdoor use. Unplug the christmas light bulbs when leaving the house, when retiring for the night, or if the christmas lights are left unattended. Your replacement bulbs are not toys! To avoid risk of fire, burns, personal injury and electric shock the replacement bulbs should not be played with or placed where small children can reach the replacement bulbs. To reduce the risk of overheating, replace any burned out light bulbs promptly with replacement bulbs. Use the proper replacement bulbs with like volt and wattage replacement light bulbs. Do not overload the electrical wiring. Only connect the recommended amount of Christmas light sets [usually three sets if not stated in the instructions] on one continues light string.