There are several amazing light displays around Boston to celebrate the holidays, but there is one spot in Topsfield that might literally be the best-decorated house in the country — a home which has drawn national attention participating in ABC's "Great Christmas Light Fight."

At 18 Orchard Lane in Topsfield, a stream of cars lined up to check out a magical and extremely bright home at the end of a cul-de-sac. Everyone was in awe of the show, including 4-year-old Jackson Gillis.

“They're good,” he said. Has he ever seen anything like it? “No.”

There are fields of blow-up Santas, reindeer, Christmas trees, candy canes, illuminated light tunnels — and at the center of it all, a house literally coated in strand after strand after strand of lights. Think Clark Griswold in "Christmas Vacation." And all of this is the brainchild of one person: 21-year-old Henry Swenson.

Swenson has been working on this, sometimes 10 hours a day, by himself since August.

“I've always wanted to go bigger with everything. And as you can see, I've definitely gotten bigger,” he said.

A Christmas display with blow-up Santa, penguins, and a blow-up Merry Christmas sign.
Henry Swenson's Christmas light display on Orchard Lane in Topsfield.
Jeremy Siegel GBH News

There are about 100,000 lights in this year’s display, he said.

“Kids love it,” he said. “It's incredible, like, how many kids come through here per night. I mean, it's got to be thousands. Just on the weekends, I feel like.”

Some neighbors come, he said — and he tries to be mindful of those who don’t love the traffic the display brings to their street.

“It's definitely a lot of traffic,” Swenson said. “The weekdays aren't too bad but the weekends like are slammed. We have to shut the street down.”

Putting it together took a lot of work, he said. He started Aug. 1, sometimes working 10 hours a day to place lights around the lawn, usually by himself.

“A lot of people think I'd get a notebook and like, write it all down. It's really all in my head,” Swenson said. “I just come out here and I'm like, OK, I want this here. And if I want to move it, I can move it, but I really didn't move anything this year.”

A house covered in thousands of colorful Christmas lights.
Henry Swenson has transformed his family's home on Orchard Lane in Topsfield into a Christmas display.
Jeremy Siegel GBH News

Some of the lights are older, he said, like a collection of vintage gingerbread men he was told were from the 1980s.

There’s also a tree made up of a 70-pound pole with blue lights hanging off of it. A friend helped him install that pole, he said.

“It's fun. It makes everybody happy. People love it,” he said.

Hearing about all of these lights — tens and thousands of them lit up every night — usually raises one big question: What does an electricity bill run you for something like this?

“We have solar, so it's not as bad as a lot of people think,” Swenson said. “I think my dad said it's like a few hundred dollars. And that's not bad considering the amount of lights.”

And even with that price tag, Swenson does not charge for people to view the lights. It’s all free, though he is collecting money for Boston Children’s Hospital. And he's raised $15,000 so far, he said.

So on this cul-de-sac north of Boston, you don't exactly have to worry about being naughty or nice and whether Santa is coming to town. With Swenson’s light show, it's kind of like he's already here.