Name: Wireless data from every light bulb
Uploaded: 2011-08-02T14:08:49Z
Duration: 12 min 35 s
Description: What if every light bulb in the world could also transmit data? At TEDGlobal, Harald Haas demonstrates, for the first time, a device that could do exactly that. By flickering the light from a single LED, a change too quick for the human eye to detect, he can transmit far more data than a cellular tower -- and do it in a way that's more efficient, secure and widespread.

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What if every light bulb in the world could also transmit data? At TEDGlobal, Harald Haas demonstrates, for the first time, a device that could do exactly that. By flickering the light from a single LED, a change too quick for the human eye to detect, he can transmit far more data than a cellular tower -- and do it in a way that's more efficient, secure and widespread.

Harald Haas: Wireless data from every light bulb

Wireless data from every light bulb

Transforming 14 billion light bulbs into Li-Fi sources offers a greener, more secure, and vastly more expansive internet.

LEDs, already ubiquitous in homes and streets, can transmit data through light, making every illuminated spot a potential internet source.

Li-Fi uses the vast and untapped spectrum of visible light, providing data transmission that's more efficient and secure than Wi-Fi.