What do you get when you mix nighttime mountain biking with massive lights and custom-made LED bike tires? A spectacular light show on a grand scale. Watch as these bikers light up mountainsides from southern Utah to the Pacific Northwest.

This footage from the adventure-sports short film "Darklight" was filmed by Sweetgrass Productions in partnership with Philips, which designed the LED lights using the same technology that powers the Philips Ambilight TV

Sweetgrass Productions on Instagram

Philips TV on Instagram

Pep Fujas on Instagram

Eric Hjorleifson on Instagram

Chris Benchetler on Instagram

Daron Rahlves on Instagram

What do you get when you mix nighttime mountain biking with massive lights and custom-made LED bike tires? A spectacular light show on a grand scale. Watch as these bikers light up mountainsides from southern Utah to the Pacific Northwest.

This footage from the adventure-sports short film "Darklight" was filmed by Sweetgrass Productions in partnership with Philips, which designed the LED lights using the same technology that powers the Philips Ambilight TV

Sweetgrass Productions on Instagram

Philips TV on Instagram

Pep Fujas on Instagram

Eric Hjorleifson on Instagram

Chris Benchetler on Instagram

Daron Rahlves on Instagram