Indicator lights are small lights on devices, vehicles, or appliances that provide visual signals about their status or operation. For example, a car may have indicator lights to show if the engine is running, if the turn signals are activated, or if there is a problem, such as low oil pressure. These lights help users quickly understand the condition of the device without needing to check other indicators. In many electronic devices, such as computers or home appliances, indicator lights can show whether the device is powered on, in standby mode, or experiencing an error. Different colors, like green for normal operation and red for warnings, help users easily interpret the information conveyed by these lights.