Xbee S2C with sengled zigbee bulb

I am using XBEE S2C module and configured as Zigbee coordinator with Zigbee stack profile set to Zigbee-pro and I am trying to discover and control Sengled Zigbee based smart bulb.

Using XCTU software in the network working mode when I scan I am able to see Sengled smart bulb getting discovered but I am unable to initialize it, as the connection line from XBEE to the bulb is in dotted lines and LQI shows “?” mark.

Please see the screenshot of the network from here - https://drive.google.com/file/d/1HO_-rgLAvUZD8vVJG-PwOVVM6w2MTTeQ/view?usp=sharing

  1. Is the end device connected/joined to the coordinator? if not connected why it is showing in the network graph?
  2. What does the dotted line from XBEE(C) to the end device indicate?
  3. If not connected how do I connect/Join the end device (Sengled bulb) to the coordinator?

I’m not a professional here, but I think you can use the Wi-Fi connection to link the devices and create a network.
I use this with my color-changing smart LED light bulbs from Vont. They are very easy to install and adjust to your personal needs. For example, I use them mostly to fall asleep easier. They can create a very calming atmosphere in the room by shining dim and soft yellow or green light, which calms down my mind and helps me fall asleep. But this is only one of the possible uses of these devices, and you can use them for parties or for creating your own home movie theater. It’s all up to you.

Zigbee is not a WIFI signal. It is an IEEE 802.15.4 standard. WiFi is an IEEE 802.11 standard.

Yes the device is Joined to the Coordinator. The line shows that there is a connection going one direction at the time.

You need to use API mode with Explicit frames to talk to a 3rd party Zigbee device. You also need to make sure you use the proper API frames to talk to the device. You will want to start with querying the active end points on the remote device.