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In fact, since they are local using Bluetooth, one could argue they are more secure than bulbs that get on the Wi-Fi. Nothing changes as far as the privacy goes. LifeX does work without a bridge but they are Wi-Fi-based bulbs and not Bluetooth or Zigbee as the Hue bulbs are. If the bulbs were too, when adding them to the bridge you'd essentially have to remove the bulbs from your HomeKit setup and reconfigure them with the bridge. Second, if you first start with the bulb then add the bridge the setup gets quite complicated as the bridge itself is a HomeKit device. The Hue Bridge is already certified as a HomeKit device and these bulbs support the bridge so why the need to get them re-certified on their own? That would inflate their cost as they pay Apple those added licensing fees and slow down their launch cycle while they wait approval from Apple. These dimmable Edison-style bulbs have recently become available in White ambience, which means they can produce any tone of white, from cool to warm. So part of the reason they didn't do that is for the complexity. Plug in the Bluetooth-enabled light in the same room as the Google Nest or Home speaker or display, then turn it on. Especially for a door opener/lock I don't trust anybody but Apple to have access. But the hubs are all Apple devices (AppleTV, HomePod or a stay-at-home iPad). The LifeX bulbs I bought for my grandson work great. The Philips Hue Bridge then uses the ZigBee wireless protocol to communicate with your bulbs, telling them to change their color to your specified settings. Well, maybe a second possibility: Stupidity When you open an app and adjust the color of your Philips Hue bulbs, your command is sent over your Wi-Fi router to the Philips Hue Bridge.
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"HomeKit is not supported in these bulbs over Bluetooth and still requires the Philipe Hue Bridge"
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