How do you illuminate a mountain, dazzle the snow with colored light, and take nocturnal skiing to vivid new heights?

View Images In British Columbia, Pep Fujas plunges into a chasm. “On this shot we had only one light source,” says photographer Oskar Enander, “so Pep was jumping straight out in the dark. Somehow he managed to land and ski away.”

First, find pristine slopes in the craggy, sylvan backcountry of British Columbia and Alaska. Then, figure out how to get 10,000 pounds of equipment—4,000-watt lights the size of washing machines, generators to power them, scaffolding, wire and cable—up peaks higher than 7,000 feet. Spend months calculating wattage and beam diameters, weights and fuel consumption, distances and topography. Hire skilled gaffers and grips. Enlist a cadre of elite athletes. Put battery packs in their pockets, zip them into light suits, and strap LED-spangled packs on their backs. Turn the camera on. Hope for the best.

View Images “Every night I was in the trees, looking for the best angle to shoot,” says Enander. “When the light crew was on top of a ridge, repositioning the lights and choosing color gels, an explosion of light beams would appear.”

That’s what Nick Waggoner and his partners at Sweetgrass Productions did in spring 2014, when a commercial shoot gave them the resources they needed to realize a longtime dream: filming night-skiing segments on a big mountain. With Swedish ski photographer Oskar Enander on hand to shoot still photos as they filmed, they set about bringing the dream to life.

Watch Glowing Skiers Fly Like Meteors of Light

What do you get when you mix nighttime skiing with massive lights and custom-made Philips LED ski suits? A spectacular light show on a grand scale.

“I can’t overstate how intense it was to do all this stuff,” says Waggoner. “So much of it had never been done before. And we were working in places with incredibly dynamic terrain, some of the deepest snow on Earth, and ever changing weather patterns. Many, many things could go wrong.”

View Images As the generators shut off in British Columbia, Enander used a long exposure to capture Pep Fujas’s progress.

View Images “This is serious terrain even in the daylight,” says Enander, “and a heavy light suit”—like this green one on Eric Hjorleifson—“blinds you when the snow blows up around you.”

View Images Before a shoot in British Columbia, Hjorleifson removes nylon strips, used to help climb hills, from his skis.

Some of them did. Eleven days into the Alaska shoot, with everything finally in place, a critical extension cord went missing. Waggoner had to persuade a helicopter pilot to fly 20 miles, in the gathering dark, to fetch a new one. “There were times,” he says, “when I put my head in my hands and said, ‘I’m defeated. I’m lost. How were we this dumb to think this was possible?’”

View Images Near Anchorage, Alaska, Chris Benchetler and Daron Rahlves light up the night in their LED suits.

Enander had his own challenges. For one thing, he couldn’t use a flash; even a fraction of a second would have disturbed the video shoot. That made it hard to get crisp images. “The biggest hurdle for me,” he says, “was shutting out my daylight thinking and focusing on shooting the night.”

But in the end, Waggoner says, the dream was realized. “This project is a metaphor for thinking big and doing things you didn’t think were possible. We want to give people new eyes to reimagine the world.”

The video footage featured in this post is from the adventure sports short film Afterglow, which was filmed by Sweetgrass Productions in partnership with Philips. Philips designed the LED suits using the same technology that powers the Philips Ambilight TV.