Lepro bulb bound?

I just bought 4 new lepro bulbs but they say bluetooth disconnected then lepro bulb bound ? What does  this mean ? 

Dear User,
 
Thank you for reaching out.

During the process of connecting the bulbs to the Lepro app, you may see "Bluetooth disconnected" due to a temporary connection issue. However, the app will attempt to reconnect, and the bulbs should be added to the device list.

If the bulbs cannot be added to the device list, please try the following steps:
1. Turn on Bluetooth.
2. Connect your phone to a 2.4G WiFi network.
3. Turn on the bulb; it will start flashing a slow blue light, indicating it's in pairing mode. If it doesn't flash blue, please reset it by switching it off and on four times. 
4. Open the Lepro App and click "Add Device."
5. If it shows "1 Device Detected" at the top, click "Check."
6. Enter your WiFi name and password.
7. Click "Next." The light bulb will be added successfully within seconds.
8. Rename the light bulb and click "Done."
 
If the connection fails, please let us know which step did not work and the error message you received so we can assist you further. A screenshot of the error message would also be helpful.

Best regards,
Lepro