How Do I Know When It Is Finally Time To Replace The Battery?Because Insulights use a high-intensity LED, you will notice the light begins to dim when the battery is nearing the end of its life. A simple way to test the unit is to tap it in your hand—if…Because Insulights use a high-intensity LED, you will notice the light begins to dim when the battery is nearing the end of its life. A simple way to test the unit is to tap it in your hand—if it flashes, it’s working properly… but once you see the lights begin to dim, just replace the battery. You can view our video onbattery replacement here.Read MoreWhere Can I Get The 2032 Battery?

Replacement batteries are widely available at drugstores and hardware retailers and are very affordable at just a couple dollars.

What Posts Do They Work With?

Insulights are the only insulator that is universal and works on most posts: Steel, T-posts and can be nailed to wood posts. Many users simply hang the Insulight on the electric fence wire.

Will INSULIGHTS Work With ALL Electrical Fencing?

YES! Whether you have wire, tape, or electric rope, your Insulights will work beautifully!

INSULIGHTS

Electric Fence Monitoring — Stay in the truck to monitor your electric fence.

Tired of walking your electric fence line every morning just to check if it's actually live?

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Reviewed by Ann Pruitt, InfoHorse.com · Updated May 2026

INSULIGHTS, Invented By A Horseman Who Needed To Find a Better Way

Bill Brown isjust a farm kid trying to keep the cattle in. He grew up on 700 acres and 150 head of cattle in Northwest Iowa, and his wife Sue grew up on a dairy farm nearby. Like countless other farm kids, they walked the fence lines to check if their electric fence was live. When the animals got out, it was like a fire drill — all hands on deck. The task of checking their electric fences followed them into adulthood. After the initial shock of one of their horses getting out and being hit by a car, Bill thought: There’s got to be a better way. After much dedicated research and the quest for just the right design, INSULIGHTS were developed in 2018. Tested in the harsh Iowa weather, which can fall to -15 degrees in the winter and reach 120 degrees in the summers, Bill and Sue stand behind the Insulights electric fence monitor with a 1 year warranty and satisfaction guarantee.

INSULIGHTS Are Visible From a Long Distance!

Who wants to go outside in the dark, or the rain or snow and check the fence?Wouldn’t it be easier to just look to see if the fence was hot? In 2018, Bill and his wife Sue foundedINsulightsa company dedicated to keeping livestock and crops safe through their patented electric fence monitor. By simply looking down the fence line, the flashing indicator shows that the fence is live. No walking the lines. No checking with pliers. It’s also designed as a wildlife deterrent, with blue plastic, a color known to deter deer, and red flashing light, which mimics a predator’s eyes at night. Insulights are visible up to 1/2 mile away at dusk or dawn.

Can INSULIGHTS Be Seen During The Day?

Yes! INSULIGHTS are visible during daylight hours,like LED Christmas lightsthat can be seen from several yards away on your Christmas tree— only these are brighter! At night, the high-intensity LED is extremely bright and can be seen up to a half mile away. Insulights are not intended to be installed on every fence post; most customers place them approximately every quarter mile or at locations visible from the house, shop, or vehicle.

Do INSULIGHTS Help To Make My Electric Fence More Visible?

Absolutely! At night, Insulights clearly indicate both the presence of the fence and that it is energized. This is especially appreciated by trail riders and campers, as Insulights function as a warning light around trailers and campsites while confirming the fence is working. They also help make that fence more visible to your horses!

Why Is Having “No Grounding Wire” Important?

Electric fences operate by sending a pulse of electricity down the fence wire and require a return path for the current. Proper grounding provides that return path and allows the energizer to function correctly. Insulights must also be grounded in order to indicate that the fence is working. When the fence is properly energized, the Insulight flashes. If a tree, branch, or other object grounds out the fence, the Insulight will stop flashing—immediately alerting you that the fence is no longer operational. Unlike traditional fence testers that require a wire and a ground stake placed in the soil,Insulights use a self-contained design powered by a 2032 watch battery.This eliminates concerns related to lightning, poor soil conditions, or installing and measuring a ground stake. Insulights are fully self-contained and simple to use.

Is It True That The Only Thing You’ll Need To Replace- Is The Battery?
Yes. The only maintenance required is replacing the 2032 watch battery, which, according to the manufacturer,should last 18 months to 24 months-much like changing batteries in a garage door opener. We make sure all batteries are included — so you won’t need to worry about it for about 18 months!

Do The Batteries Really Last 18 Months?

The 2032 battery itself is rated to retain power for over eight years when unused. In active fence applications, the battery should last for 18 – 24 months, according to the manufacturer. If a customer reports that an Insulight is not flashing, we suggest tapping it in their hand. If it flashes, the Insulight is functioning correctly, and the fence is likely down. Many customers report battery life beyond 18 months, but replacement intervals are similar to other household battery-powered devices.

What Customers Say

“Insulights give you peace of mind and easier, worry-free fence monitoring. Instead of having to put a tester on several sites, I can just check the blinking lights. We’re very pleased with it, and I have even talked my father-in-law into purchasing one.

Order Your INSULIGHTS Today & Leave The Worry Behind!

No more driving or walking the fence to see if it is working. You will be able to view your Insulights up to 1/2 mile away! If they are blinking, your fence has power! If you have electric wire, tape, or rope, you Need Insulights!Order today!

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The Solution Section (FAQ)

What is an INSULIGHTS electric fence monitor?

INSULIGHTS is a patented electric fence monitor that flashes when your fence is live, so you can see at a glance that it has power instead of walking the lines or checking with pliers. If a tree, branch, or other object grounds out the fence, the Insulight stops flashing and immediately alerts you that the fence is no longer working. It was developed in 2018 by Iowa farmer Bill Brown after one of his horses got out and was hit by a car.

How far away can you see an INSULIGHTS monitor?

INSULIGHTS are visible up to a half mile away at dusk or dawn, and the high-intensity LED is extremely bright at night. They are also visible during daylight hours, similar to LED Christmas lights seen from several yards away, only brighter. Most customers place them roughly every quarter mile or wherever they can be seen from the house, shop, or vehicle.

Will INSULIGHTS work with my type of electric fencing?

Yes. INSULIGHTS work with electric wire, tape, or rope fencing. They are also described as the only universal insulator, working on steel and T-posts, nailing to wood posts, or simply hanging on the electric fence wire.

Do INSULIGHTS need a ground wire or ground stake?

No. Unlike traditional fence testers that require a wire and a ground stake placed in the soil, INSULIGHTS use a self-contained design powered by a 2032 watch battery. This eliminates concerns about lightning, poor soil conditions, or installing and measuring a ground stake. When the fence is properly energized, the Insulight flashes; when the fence loses power, it stops.

How long does the battery last, and is it included?

The 2032 watch battery should last 18 to 24 months in active fence use, according to the manufacturer, and every Insulight ships with the battery included so it is ready to go. When the battery nears the end of its life, the high-intensity LED begins to dim, which is your signal to replace it. Replacement 2032 batteries are widely available at drugstores and hardware retailers for a couple of dollars.

Can INSULIGHTS help make my electric fence safer for horses?

Yes. At night, INSULIGHTS clearly show both the presence of the fence and that it is energized, which helps make the fence more visible to your horses. They are also valued by trail riders and campers as a warning light around trailers and campsites. The blue plastic helps deter deer and the red flashing light mimics a predator's eyes at night, adding a wildlife-deterrent benefit.

How do I check that an INSULIGHTS unit is working?

If an Insulight is not flashing, tap it in your hand; if it flashes, the unit is working correctly and the fence itself is likely down. Bill and Sue Brown stand behind every Insulight with a one-year warranty and a satisfaction guarantee.

How can I order INSULIGHTS or ask a question?

You can reach INSULIGHTS by phone at 712-568-3005 or by email at info@insulights.com, and order or learn more at www.insulights.com. Owners Bill and Sue Brown are happy to help you choose the right setup to monitor your electric fence.