From 2011: light bulbs can spy on you.

And detect your heart rate from a distance.

Some smart LED light bulbs may have WIFI or cell service or both.

2011 Ted Talk on smart Lightbulbs to spy on you. They can use cell phone towers nearby to transmit information about you to any central place in the world.

Another article from 2022:

Sengled’s newest smart bulb can track your heart rate. The smart lighting company also announced Wi-Fi TV Light Strips with Video-Sync and support for Matter. This means they can see how many people are at home. (Older military technology can detect your heart rate through walls, and track you through walls as well.) https://www.theverge.com/2022/1/3/22864783/sengled-smart-health-monitoring-smart-bulb-ces2022