I made a widget to control bike lights through ANT+ or to simply check what modes they are currently set to and their battery.
You can download here: https://apps.garmin.com/en-US/apps/ffb5ac11-7377-4cc4-a41e-8c77eb8985d2
Please use this thread to post bugs or possible features to be added.
The animations correspond to the modes on the bontrager bike lights and these are also the lights I tested.