It scans them with a brief burst of invisible light.

He leans over and shines his invisible light down the shaft.

Infrared heaters produce heat that's a product of invisible light.

The rich color range comes from the inclusion of invisible and near-infrared light.

Well, the military has chemlights that give off invisible light.

It was glowing with invisible light, hanging in the air between them.

The idea is to replace the wire with beams of invisible light.

A single invisible firefly light showed up before his nose.

Instead, 80 beams of invisible light will shine across the door opening, from the top to bottom.

Let's start with the "active" systems, those that send out blasts of invisible light or inaudible sound.