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Best christmas light testers - April 2026

Last Updated - April 3, 2026

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

LIGHT KEEPER PRO

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

LIGHT KEEPER PRO

$33.33

More Details
Main highlights
- 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.
- 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.
- 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 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 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.
- 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.
- Over 6 million LightKeeper Pros sold! Makes for the perfect gift to yourself or your friends & family who love to decorate!
- 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).
$33.33
2

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Simple Living Solutions

2-in-1 Ladderless Light Tester

Simple Living Solutions

$29.99

More Details
Main highlights
- This tester can attach to any threaded pole or can be used by hand
- The tester is a tool that fixes incandescent mini light sets
- Measures 1.46 inches long by 5.71 inches wide by 9.25 inches in height
- Ladderless Christmas Light Tester
- Features a plug at the base of the tester
$29.99
3
14% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

LIGHT KEEPER PRO
14% Off

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

LIGHT KEEPER PRO

$23.11

$26.99
(14% Off)

More Details
Main highlights
- 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.
- 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.
- 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 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.
- 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.
- LightKeeper Pro is UL Listed (#230566) and fixes most incandescent light sets in seconds with the squeeze of the trigger.
- 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).
- Great for Pre-Lit Trees, icicle light sets, net lights, wreaths, garland, and other pre-lit décor. Over 6 million LightKeeper Pro's sold!
$23.11
$26.99 (14% Off)
4
Best Value
23% Off

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

LED Keeper
23% Off

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

LED Keeper

$23.00

$29.99
(23% Off)

More Details
Main highlights
- 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).
- Universal POD included to assist with socket issues or if you simply don't have the correct replacement bulb your set requires
- 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 fixes LED Light Sets (Does NOT work on Incandescent light sets)
- 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.
- Includes Bulb & Fuse Tester, Bulb Puller and 9V Battery, 2 Place markers assist in testing, and 1 Replacement POD
$23.00
$29.99 (23% Off)
5

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

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

allsun

$16.79

$18.47
(9% Off)

More Details
Main highlights
- 【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.
- 【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).
- 【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.
- 【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.
$16.79
$18.47 (9% Off)

Best christmas light testers - April 2026

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

2-in-1 Ladderless Light Tester

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

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

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

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

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