You can see the instructions for this connection using this instruction link
The Amazon Echo Dot (4th Generation) and SYLVANIA Smart+ Full Color LED Bulb A19 can communicate with each other using a bridge. This bridge is necessary because there is no shared connection between the two devices.
With the Sylvania OSRAM Lightify Wireless Gateway Hub, The SYLVANIA Smart+ Full Color LED Bulb A19's Wi-Fi can connect to the bridge, and the bridge can connect to the Zigbee connection of the SYLVANIA Smart+ Full Color LED Bulb A19. The Sylvania OSRAM Lightify Wireless Gateway Hub also has Amazon Alexa compatibility, ensuring the connection can be made.
Another compatiblity is to use the connections between the third party Samsung SmartThings Hub 3rd Generation with the SYLVANIA Smart+ Full Color LED Bulb A19. This method can use the bridge to connect to the Zigbee connection of the SYLVANIA Smart+ Full Color LED Bulb A19. The Samsung SmartThings Hub 3rd Generation also has Amazon Alexa compatibility, allowing all of the devices to communicate to each other.
Interface Compatibility
 Amazon Echo Dot (4th Generation) |
 Sylvania OSRAM Lightify Wireless Gateway Hub * Bridge required |
 SYLVANIA Smart+ Full Color LED Bulb A19 |
|
|---|---|---|---|
| Amazon Alexa | Yes | Yes | Yes |
| Apple HomeKit | No | No | No |
| Google Assistant | No | Yes | Yes |
Connection Compatibility
|
Amazon Echo Dot (4th Generation) |
Sylvania OSRAM Lightify Wireless Gateway Hub * Bridge required |
SYLVANIA Smart+ Full Color LED Bulb A19 |
|
|---|---|---|---|
| Amazon Sidewalk | No | No | No |
| Bluetooth | Yes | No | No |
| Clear Connect | No | No | No |
| Thread | No | No | No |
| Wi-Fi | Yes | Yes | No |
| Z-Wave | No | No | No |
| Zigbee | No | Yes | Yes |