2.5 Volt Mini Christmas Replacement Bulbs for Christmas Trees and Incandescent String Lights, Pinched Base, 50 Count

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• 2.5 volt mini replacements bulbs for incandescent Christmas lights
• Pinched base shape fits most light sets
• Value pack includes 50 bulbs
• Choose from Clear, Multi, Red, Green, Blue, Yellow, Amber, and Pink
• Available in 3 different wattages including 0.42 watt (170 mA), 0.5 watt (200 mA), and 0.25 watt (100 mA)
• Please, check the white tag near the plug to confirm bulb specifications

These 2.5V mini Christmas replacement bulbs for incandescent string lights are made with a pinched base which means that they will fit most light sets (whether a pinched base is required or not). 2.5V lamps are very common for string lights with 50 or more lamps, however it is very important to confirm the amperes (or wattage) for your particular light set to be sure that you get the correct brightness. We offer the following three options for 2.5 volt lamps:

170 mA (0.42 watt): These are the most common 2.5 volt mini replacement bulbs used now-a-days and are intended for use with incandescent string lights that require 0.42 watt lamps. These lamps will shine nice and bright in light sets that recommend between (0.41 – 0.44 watt lamps).

200 mA (0.50 watt): These 'high wattage' replacement bulbs are for use with incandescent string lights that require 0.5 watt lamps. These string lights are fairly common and have been the standard for certain brands, most notably GKI Bethelem. The 0.5 watt bulbs are intended to be brighter than traditional 0.42 watt lamps, however, if you use these lamps in a light set that requires a lower wattage, they will often glow dim. It is important to double check the wattage (or amperes) required for your light set before purchasing.

100 mA (0.25 watt): These lamps are intended ONLY for incandescent string lights that require low wattage or energy saver light bulbs. This wattage is not common, but it has been used on different light sets and decorations for years. Most light sets of this nature will specifically state that you need to use 100 mA bulbs (or 0.25 watt) bulbs as replacements. This is typical of light sets termed heavy duty and it most commonly found on sets of 200+ lights or icicle light sets. If you use these replacement bulbs in light sets that require higher wattage lamps, these lamps will flash and burn out immediately. It is important to double check the wattage (or amperes) required for your light set before purchasing.

These 2.5 volt replacement bulbs are sold 'naked' which means that they do not come with any plastic husk. Please be sure to keep the plastic husk that the old bulbs are removed from so that these will incorporate into your string light. The unique pinched base shape to these bulbs allows them to set fully down inside of most any husk to make meaningful contact with the brass contacts inside.

Please be sure to reference the tag near the male plug on your light set to confirm both the voltage and the wattage for your string. Voltage, amperes, and wattage must all match to ensure that the lamps will light with proper brightness.

If you have any questions, or need help troubleshooting, please feel free to give us a call at 1-877-750-0971. We can also be reached through the contact us form on our website.

Bulb Dimensions:
Length of glass - 7/8 inch
Length of wire - 3/8 inch
Diameter of glass - 5 mm


prop-65-warning-6-pt.png WARNING: This product can expose you to chemicals including lead, benzene, and cadmium, which are known to the State of California to cause cancer, birth defects, or other reproductive harm.  Wash hands after use.  For more information go to

Additional Details


48 Reviews

  • 5

    Published by JACK on Aug 25th 2022

    These lights are getting harder and harder to find. I have a few strings I don't want to replace for sentimental reasons so these lights and company are a life saver... thanks.

  • 5
    2.5volt bulb

    Published by Unknown on Feb 13th 2022

    Just what I needed to fix light string thank you

  • 5
    perfect replacements

    Published by jim on Jan 30th 2022

    bulbs worked as advertised, fit and functioned perfectly.

  • 5
    All colors received were great

    Published by Rosemary B. on Jan 28th 2022

    I appreciate the guidance to get the correct bulbs I needed to complete my project.

  • 4

    Published by Jerry K. on Jan 28th 2022

    Need to ship in small box. My last shipment came in an envelope.

  • 4

    Published by Leigh E B. on Jan 21st 2022

    everything worked

  • 5
    2.5 volt mini Christmas Replacement bulbs

    Published by William on Jan 21st 2022

    good price, met my needs, no problems, delivery late compared to your promise

  • 5
    Great Bulbs to revive our strands

    Published by Unknown on Jan 17th 2022

    Worked great! Not many companies list both the wattage and voltage, but both are critical to have the strand light up properly. So glad to have found these.

  • 3
    not really pink

    Published by Jenn on Jan 14th 2022

    I bought the pink and they are not pink in color but red. disappointed in the color but work in my tree.

  • 3
    Ok but

    Published by Paula on Dec 16th 2021

    I guess I didn’t read description well enough Thought they included the base Will be able to use, just not what I was expecting

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