The device detected the distinctive heat pattern generated by high-intensity lamps used to accelerate the growth of the plants.
Typically, you sit in front of a high-intensity fluorescent lamp for 30 minutes to 2 hours each morning.
The police occasionally use the technology to locate marijuana inside by spotting the heat from the high-intensity lamps used to grow it.
"But I'll need the high-intensity lamp from my bag."
The high-intensity growing lamps added to the heat, using what detectives described as a tremendous amount of electricity.
She looks up, her eyes nearly marble-white under the small, high-intensity lamp above her bed.
She turned away from the high-intensity lamp, and he saw that she was close to tears.
Further, most high-intensity lamps need a complex shutter system to produce the proper high beam pattern.
Sometimes hum is caused by high-intensity lamps placed too near the audio components.
Then he realized the penetrators were attacking blind, relying on the high-intensity lamps to guide them!