The notification LED can be turned on or off on the LG smartphone. Besides announcing unread notifications, the LED also shows the battery status (empty/full).

Depending on the device model, the color of the notification LED can be adjusted.

Android 9 | LG UX 9.0
Step 1:  Open the  Settings
Step 2:  Tap on  General
Step 3:  Tap on  Apps & notifications
Step 4:  Tap on  Notifications
Step 5:  Enable or Disable  Blink LED
  1. Open the Settings
  2. Tap on General
  3. Tap on Apps & notifications
  4. Tap on Notifications
  5. Enable or Disable Blink LED

LG Instructions