What does the LED indicator on my Acaia Lunar indicate?

Left:

• Lightning - power charge indication (the Lunar is plugged into a power source)
• Dot - short flash = Key press indication
• Dot- long flash = Bluetooth connected

Right:

• Dot - Ounce mode 
• Droplet - Timer starts when liquid flow detected
• Triangle - Timer starts when auto-tare performed
• Square - Automatically tares any weight except flow detected

For a more thorough description of the Lunar's modes, see our blog post about it.