10 Best Christmas Light Bulb Tester of 2026

Last updated on 05/03/2026
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Best Choice
1
9.7
Exceptional
Save 5%
LED Bulb Power Tester, 60-300V Adaptive Voltage LED Strip Lamp Beads Light Source Testing Tool B22 E14 E27 GU10 G4 to G12 G9
CHEOTIME

LED Bulb Power Tester, 60-300V Adaptive Voltage LED Strip Lamp Beads Light Source Testing Tool B22 E14 E27 GU10 G4 to G12 G9

5% Off
Why we love it
  • Measures voltage, current, power.
  • Versatile socket compatibility.
  • Precise readings across range.
Main Highlights
  • Multi Functional Testing: This LED bulb power tester is equipped with dual control switches to evaluate voltage, current, and wattage across a wide range from 60 to 300 volts and up to 600 watts. The device is suitable for assessing both semi finished and fully assembled lighting products, providing essential data for troubleshooting driver power supplies and LED chips in various work environments.
  • Wide Socket Compatibility: Designed for broad application, the unit features a built in interface that accepts B22, E14, E27, GU10, G4 to G12, and G9 lamp bases. This eliminates the need for multiple adapters and allows this voltage tester to accommodate standard household bulbs as well as specialized spotlight and appliance lighting fixtures commonly found in residential and commercial maintenance tasks.
  • Clear Digital Readout: The display provides straightforward feedback for electrical testing by showing input voltage when idle and transitioning to power consumption after a one second load connection. Constructed from durable PC and phosphor bronze materials, this light fixture tester maintains an error margin of approximately 0.2 percent, ensuring that readings are consistent for evaluating fixture performance.
  • Efficient Plug In Operation: Streamline your diagnostic workflow with the straightforward plug in socket design. Users simply insert the bulb or light source into the correct receptacle and activate the switch to commence evaluation. This streamlined approach reduces the complexity of electrical diagnostics, enabling electricians and home improvement enthusiasts to swiftly verify whether a lighting component is functioning within expected parameters.
  • Practical For Workshop Use: Ideal for electricians, lighting showroom staff, and DIY homeowners, this meter serves as a convenient bench tool for verifying lighting components before installation. With a load current capacity of 3A, the unit offers practical assistance in isolating faults in LED panel lights and fixtures, helping to confirm functionality and avoid unnecessary component replacement during routine repair and assembly tasks.
9.7
Exceptional
Save 5%
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🛡️Trusted by 100M+ UsersWhy?
3
9.3
Superb
Save 19%
Light Keeper Pro-The Complete Tool For Fixing Your Christmas Lights
LIGHT KEEPER PRO

Light Keeper Pro-The Complete Tool For Fixing Your Christmas Lights

19% Off
Why we love it
  • One-Touch automatic repair.
  • Advanced diagnostic features.
  • Indoor and outdoor use.
Main Highlights
  • Complete Repair Solution: The LightKeeper Pro is a comprehensive tool designed to diagnose and fix the most common problems with miniature light sets, including icicle lights, net lights, yard decorations, pre-lit trees and wreaths, saving you time and money during the holiday season
  • One-Touch Automatic Repair: Simply plug your malfunctioning light set into the LightKeeper Pro and press the trigger to automatically fix most lighting issues without the need to replace entire strands or spend hours troubleshooting individual bulbs
  • Advanced Diagnostic Features: Equipped with an audible continuity detector and integrated fuse and bulb tester to help identify and resolve electrical issues quickly, ensuring your holiday displays shine brightly throughout the season
  • Convenient Built-In Accessories: Features an easy-to-use bulb puller for safe bulb removal, a storage compartment for organization, and includes extra 2.5 volt replacement bulbs so you have everything needed for repairs in one compact tool
  • Indoor and Outdoor Use: UL Listed for safety and comes with batteries included, making it ready to use right out of the package for fixing both indoor and outdoor Christmas light displays with confidence
9.3
Superb
Save 19%
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4
9.3
Superb
Portable LED Bulb Tester, Test Light Kit for Electrical and Automotive Use Plug in Led Lamp Tester Dc Voltage Detector and Led Circuit Tester with Dual Switches
WOHPNLE

Portable LED Bulb Tester, Test Light Kit for Electrical and Automotive Use Plug in Led Lamp Tester Dc Voltage Detector and Led Circuit Tester with Dual Switches

Why we love it
  • Plug-in interface speeds checks.
  • Versatile testing for LEDs.
  • Accurate readings, easy use.
Main Highlights
  • Convenient Plug In Interface: This unit uses a plug in socket and simple controls so users insert the lamp or module, select the function and view results immediately, making routine checks fast and repeatable with common shop setups and compatible with test light and electrical tester workflows.
  • Multi Functional Design: This compact tester offers dual control switches to measure voltage, current and power for both semi finished and finished lighting items, streamlining bench checks and QC tasks while working alongside led bulb tester and led lamp tester box tools for rapid evaluation.
  • Wide Application Range: This tester handles driver power supplies, LED chips and LED panel lights and performs well in high voltage environments, supporting lab, workshop and field use when paired with a led circuit tester or a dc voltage detector for broader diagnostics.
  • Accurate Measurements: This device delivers readings with a tight error margin of 0.2%, enabling confident assessment of lamp and driver output; it works effectively as an on-bench led voltage tester and as part of a quick check routine with a led power tester.
  • User Friendly Operation: Designed for ease of use, the tester’s clear indicators, plug-in method and intuitive switches let technicians and hobbyists perform tests quickly, reducing setup time and fitting smoothly into existing electrical tester and test light toolkits.
9.3
Superb
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5
9.3
Superb
Save 7%
LightKeeper Pro Quick Fix Incandescent Christmas Holiday Light Set Repair Tool | UL Listed (#230566)
LIGHT KEEPER PRO

LightKeeper Pro Quick Fix Incandescent Christmas Holiday Light Set Repair Tool | UL Listed (#230566)

7% Off
Why we love it
  • Repairs lights in seconds.
  • Ideal for all holiday decor.
  • Includes essential testing tools.
Main Highlights
  • LightKeeper Pro is UL Listed (#230566) and fixes most incandescent light sets in seconds with the squeeze of the trigger.
  • Great for Pre-Lit Trees, icicle light sets, net lights, wreaths, garland, and other pre-lit décor. Over 6 million LightKeeper Pro's sold!
  • Includes Bulb Tester, Fuse Tester, Bulb Puller, Storage Compartment for spare bulbs & fuses, 10 clear replacement bulbs (2.5V, 170mA). Even includes Batteries (1.5 Volt Alkaline).
  • The LightKeeper Pro has two repair methods: 1) The LightKeeper Pro's Quick Fix Method repairs the #1 cause of light set failure known as a Shunt Issue (internal bulb failure). 2) The LightKeeper Pro's Audible Voltage Detector assists in finding interuptions in the circuit such as loose bulbs, connection issues within the socket, etc. This feature does not work on a lit light set that has no issues. Check out our instructional videos to learn why.
  • The average incandescent light set only lasts up to about 2000 hours. Our LightKeeper Pro can fix most incandescent, series wired light sets unless the light set has been used to the full capacity and has no more life left in it.
  • Over our 20+ years of being the light set repair experts, we have gained tips and tricks for particular light sets. For example, a pre-lit tree has more elements involved as opposed to a regular, loose light set. Be sure to reach out to our customer support by email or through our toll free line if you would like assistance troubleshooting your specific issue. We're here and happy to help.
  • The LightKeeper Pro is not intended for LEDs, Rope lights or light sets with control boxes (including battery packs). The LightKeeper Pro only works to assist with light sets wired in series, meaning the bulbs rely on one another to illuminate. If you can go up to a lit section of your light set and remove a bulb, and the section then becomes unlit, then your set is indeed wired in series-- meaning the LightKeeper Pro should be able to assist with this type of light set.
  • Ulta-Lit Tree Company (the manufacturer) offers a Lifetime Warranty (excluding batteries & bulbs) on this item, testing to the highest standards to ensure that quality items arrive at your door. For more information, visit UltaLit.com.
9.3
Superb
Save 7%
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6
9.3
Superb
LightKeeper Pro Quick Fix Incandescent Christmas Holiday Light Set Repair Tool with 50 Bonus Replacement Bulbs | UL Listed (#230566)
LIGHT KEEPER PRO

LightKeeper Pro Quick Fix Incandescent Christmas Holiday Light Set Repair Tool with 50 Bonus Replacement Bulbs | UL Listed (#230566)

Why we love it
  • Repairs lights in seconds.
  • Includes essential testing tools.
  • Perfect gift for decorators.
Main Highlights
  • LightKeeper Pro fixes most incandescent light sets in seconds with the squeeze of the trigger! LightKeeper Pro's Quick Fix Method repairs the #1 cause of light set failure known as a Shunt Issue (internal bulb failure).
  • Includes Bulb Tester, Fuse Tester, Bulb Puller, Storage Compartment for spare bulbs & fuses, 10 clear replacement bulbs (2.5V, 170mA). Even includes Batteries (1.5 Volt Alkaline).
  • Over 6 million LightKeeper Pros sold! Makes for the perfect gift to yourself or your friends & family who love to decorate!
  • The LightKeeper Pro is not intended for LEDs, Rope lights or light sets with control boxes (including battery packs). The LightKeeper Pro only works to assist with light sets wired in series, meaning the bulbs rely on one another to illuminate. If you can go up to a lit section of your light set and remove a bulb, and the section then becomes unlit, then your set is indeed wired in series-- meaning the LightKeeper Pro should be able to assist with this type of light set.
  • The Audible Voltage Detector is designed to work on UNLIT light sets only. Please view our instructional video, Audible Voltage Detector Part 2 for an explanation of why.
  • The LightKeeper Pro is UL Listed (#230566) and great to fix pre-lit trees, icicle light sets, net lights, wreaths, garland, and other pre-lit decor.
  • The LightKeeper Pro has two repair methods: 1) The LightKeeper Pro's Quick Fix Method repairs the #1 cause of light set failure known as a Shunt Issue (internal bulb failure). 2) The LightKeeper Pro's Audible Voltage Detector assists in finding interuptions in the circuit such as loose bulbs, connection issues within the socket, etc. This feature does not work on a lit light set that has no issues. Check out our instructional videos to learn why.
  • The average incandescent light set only lasts up to about 2000 hours. Our LightKeeper Pro can fix most incandescent, series wired light sets unless the light set has been used to the full capacity and has no more life left in it.
  • Over our 20+ years of being the light set repair experts, we have gained tips and tricks for particular light sets. For example, a pre-lit tree has more elements involved as opposed to a regular, loose light set. Be sure to reach out to our customer support by email or through our toll free line if you would like assistance troubleshooting your specific issue. We're here and happy to help.
  • Ulta-Lit Tree Company (the manufacturer) offers a Lifetime Warranty (excluding batteries & bulbs) on this item, testing to the highest standards to ensure that quality items arrive at your door. For more information, visit UltaLit.com.
9.3
Superb
Amazon Logo
7
9.1
Superb
Save 17%
LED Keeper NEW Pro - The Complete LED Christmas Holiday Light Set Repair Tool To Fix LED Light Sets
LED Keeper

LED Keeper NEW Pro - The Complete LED Christmas Holiday Light Set Repair Tool To Fix LED Light Sets

17% Off
Why we love it
  • Quickly fixes LED light sets.
  • Includes essential testing tools.
  • Lifetime warranty for peace of mind.
Main Highlights
  • The LED Keeper Pro fixes LED Light Sets (Does NOT work on Incandescent light sets)
  • Includes Bulb & Fuse Tester, Bulb Puller and 9V Battery, 2 Place markers assist in testing, and 1 Replacement POD
  • Universal POD included to assist with socket issues or if you simply don't have the correct replacement bulb your set requires
  • Works great to test & repair series wired LED light sets (where you remove one bulb from a lit section and the section then becomes unlit because the bulbs rely on one another to complete the circuit).
  • Ulta-Lit Tree Company (the manufacturer) off ers a Lifetime Warranty (excluding batteries & bulbs) on this item, testing to the highest standards to ensure that quality items arrive at your door. For more information, visit UltaLit.com.
  • THE LED KEEPER PRO IS INTENDED FOR CONVENTIONAL CHRISTMAS LED LIGHT SETS THAT ARE MANUFACTURED IN SERIES DESIGN. THE LED KEEPER PRO CANNOT ASSIST WITH INCANDESCENTS, ROPE LIGHTS, LIGHT SETS WITH CONTROL BOXES, LOW VOLTAGE (MOST PRE-LIT TREE DESIGNS) OR BATTERY OPERATED SETS.
9.1
Superb
Save 17%
Amazon Logo
8
9.0
Superb
allsun Christmas Light Tester with 50pcs 2.5V Bulbs, Non-Contact Voltage Tester and Repair Tool, 12-600Vac Christmas Tree Light Tester for Holiday String Lights, Bulb and Fuse Checker
allsun

allsun Christmas Light Tester with 50pcs 2.5V Bulbs, Non-Contact Voltage Tester and Repair Tool, 12-600Vac Christmas Tree Light Tester for Holiday String Lights, Bulb and Fuse Checker

Why we love it
  • All-in-one tool for convenience.
  • Quick diagnostics save time.
  • Built-in remover simplifies repairs.
Main Highlights
  • 【ALL-IN-ONE CHRISTMAS LIGHT TESTER & REPAIR TOOL】This tool combines multiple functions into one: a non-contact voltage detector, a bulb tester for Christmas lights, a fuse checker, and features a built-in bulb remover. It's the complete Christmas light repair kit you need. Each bulb must be removed and tested individually for precise results.Power Supplied by 2 pieces 1.5V LR44 button cells.Open the battery cover and remove the battery insulation sheet.
  • 【QUICK BULB & FUSE DIAGNOSTICS】Easily identify faulty components. Use the bulb test function to check Christmas light bulbs, and the fuse test function to verify fuses. This Christmas light checker tool eliminates guesswork. 50pcs Bulbs is 2.5 Volt Replacement Light Bulbs for Xmas Trees Decorative Light Supplies, 0.17 Ampere, 0.43 Watt.The lighting effect can bring a comfortable atmosphere to any scene.DESIGNED FOR Traditional Incandescent Lights,NOT COMPATIBLE with LED Lights.
  • 【SAFE NON-CONTACT VOLTAGE DETECTION】This AC voltage detector safely identifies live wires from 12V to 600V. An adjustable sensitivity knob ensures accurate readings, making it a reliable Christmas tree light tester for safe holiday setup.These can be connected with light strings on Christmas trees, wreaths, garlands and similar lighted decorations.
  • 【BUILT-IN BULB REMOVER FOR EASY FIXES】The integrated, retractable bulb remover helps you safely extract even the most stubborn bulbs from their sockets, simplifying the Christmas light repair process.This is a flexible tool that provides a unique ability to check holiday lights and power to ensure they are capable of being lit and used.
  • 【INCLUDES 50 REPLACEMENT BULBS & WIDE COMPATIBILITY】Comes with a pack of 50 spare bulbs 5 Colors (Red, Purple, Blue, Pink, Green) for immediate repairs AND 1 piece allsun GK13 Christmas light tester.This string light tester is compatible with most standard holiday lighting sets, ensuring your displays stay bright.
9.0
Superb
Amazon Logo
9
8.9
Excellent
allsun Christmas Light Tester and Fixer with 50 Bulbs & Battery Tester, Non-Contact Voltage Detector Pen for Holiday String Lights, Fuse Tester Gun, Christmas Tree Light Repair Tool Kit
allsun

allsun Christmas Light Tester and Fixer with 50 Bulbs & Battery Tester, Non-Contact Voltage Detector Pen for Holiday String Lights, Fuse Tester Gun, Christmas Tree Light Repair Tool Kit

Why we love it
  • All-in-one holiday solution tool.
  • Clear alerts for easy testing.
  • Ergonomic design for comfortable use.
Main Highlights
  • 【ALL IN ONE SOLUTION】This 3 in 1 Christmas light tester tool combines a non-contact voltage detector (12V-600V AC), a bulb and fuse tester, and a battery tester. It's the Christmas light repair tool for quickly diagnosing and fixing issues with your holiday string lights. Each bulb must be removed and tested individually for precise results.
  • 【CLEAR ALERTS & COMPATIBILITY】Get clear results with audible and visual (beep & LED) indications. Please note: For best results, this tester is designed for traditional incandescent Christmas lights. It may not work with all LED light strings.Power Supplied by 2 pieces 1.5V LR44 button cells.NOTE:Open the battery cover and remove the battery insulation sheet.
  • 【EASY TESTING & REPLACEMENT】Features a built-in bulb remover. Easily test bulbs for Christmas lights and fuses individually to find the exact fault. This Christmas bulb checker makes fixing Christmas lights a simple, precise process.Bulbs Incandescent Light Bulbs 2.5V Mini Glass Lights. 0.17 Ampere, 0.43 Watt (Red, Purple, Blue, Pink, Green).
  • 【EXCLUSIVE BATTERY TESTER】Beyond lights, it's a handy battery tester for common household batteries (like AA/AAA/C/D/9V/1.5V button cell). A versatile addition that makes this Christmas light checker tool useful all year round.NOTE:The battery tester is activated by the battery being checked. Keep test times as short as possible, to avoid unnecessary battery drain.
  • 【ERGONOMIC DESIGN】The gun-style Christmas light fixer is designed for comfortable, one-handed operation. Its portable size makes it easy to store and carry. An essential Christmas light tool for every home.Non-contact 12-600V AC detection.
8.9
Excellent
Amazon Logo
10
8.9
Excellent
Christmas Light Bulb Tester, String Light Bulb Tester with English Manual ABS Fluorescent Tester for Tools
Generic

Christmas Light Bulb Tester, String Light Bulb Tester with English Manual ABS Fluorescent Tester for Tools

Main Highlights
  • 【Neon Navigation】- Discover the of neon with our christmas light bulb tester.Its intuitive design allows it to illuminate upon touch,making it indispensable for detecting various neon light tubes. Perfectly compatible with dry batteries,it's crafted to ensure low power consumption while offering performance.
  • 【Practical Power】- Experience the ease of work with our string light bulb tester.Designed to work with dry batteries (not included),it minimizes power usage while maximizing functionality,allowing for efficient neon light repairs in any setting without frequent battery replacements.
  • 【Insight】- Achieve immediate results with the fluorescent tester.This feature allows the LED indicator and neon light to flash upon pressing the power button,ensuring quick and precise diagnosis of any neon light issues encountered.
  • 【Compact Convenience】- Experience unmatched portability with our Small Neon Detector.Lightweight and compact,it is easy to carry,ensuring rapid identification of neon light faults wherever you,without the burden of bulky equipment.
  • 【Versatile Application】- Suitable and DIY enthusiasts alike,the Portable Neon Tube Tester is an ideal tool for light-fixture pavilions,hardware stores,electricians as well as home and shipment inspections,making it a versatile addition to any toolkit.
8.9
Excellent
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Related Deals You Might Like for Christmas Light Bulb Tester

📊We scanned 413 products
🔍
We reviewed the most relevant Christmas Light Bulb Tester offers across Amazon and leading retailers, covering major brands and models. Our shortlist features trusted names like CHEOTIME, Simple Living Solutions, LIGHT KEEPER PRO, WOHPNLE, LED Keeper, allsun, Generic, known for dependable quality and smart design.
⭐
To determine today's best Christmas Light Bulb Tester, we analyzed 2066 real customer and expert reviews, focusing on satisfaction, real-world performance and long-term reliability. We also weigh each review's relevance, authenticity and freshness for a fair comparison.

Here's what we found:

🏆 #1
LED Bulb Power Tester, 60-300V Adaptive Voltage LED Strip Lamp Beads Light Source Testing Tool B22 E14 E27 GU10 G4 to G12 G9

Our overall winner is LED Bulb Power Tester, 60-300V Adaptive Voltage LED Strip Lamp Beads Light Source Testing Tool B22 E14 E27 GU10 G4 to G12 G9 by CHEOTIME. It stands out for the right balance of quality, performance and value.

✨ What sets it apart:
✓Measures voltage, current, power
✓Versatile socket compatibility
✓Precise readings across range
💎 Best Value
2-in-1 Ladderless Light Tester

The best value for most shoppers is 2-in-1 Ladderless Light Tester by Simple Living Solutions, with consistently high satisfaction across expert and customer reviews.

💰 Best Deal
Light Keeper Pro-The Complete Tool For Fixing Your Christmas Lights

The strongest deal right now for Christmas Light Bulb Tester is Light Keeper Pro-The Complete Tool For Fixing Your Christmas Lights at LIGHT KEEPER PRO, currently at 19% off.

🔄Our Christmas Light Bulb Tester ranking is updated regularly to reflect new releases and price changes-check back for the latest picks and deals.