Step 1: Tap My Devices.
Step 2: In order to delete a device, tap & hold the device. Enter the password, tap on Delete and follow the instructions below.
Step 3: Make sure the bulb is ON. Now, switch OFF the bulb for 2 seconds and switch it ON for 1 second. Again switch OFF the bulb for 2 seconds and switch it ON for 1 seconds till the bulb blinks.
Step 4: Now the bulb will be deleted from the hub.