They go as far as having lights transmit which part of the store you're in with imperceptible flickering: https://www.usa.lighting.philips.com/systems/lighting-

They go as far as having lights transmit which part of the store you're in with imperceptible flickering: https://www.usa.lighting.philips.com/systems/lighting-systems/indoor-positioning https://www.usa.lighting.philips.com/systems/lighting-system...