Abstract: An emergency lighting system for a building includes at least one LED-based light. An emergency detector is operable to detect an emergency. The emergency detector produces an emergency signal in response to the emergency. A controller is operable to control the at least one LED-based light in response to the emergency signal.

Abstract: The present invention relates to system and method for informing a critical situation by using network, to ask for help about present danger to Crime Prevention Center. When a user is facing a dangerous person, the user inputs images or a voice of the dangerous person to ask for help using an image input apparatus in a stealthy way. Then, the image input apparatus automatically transmits the inputted image data and/or voice data as well as present position data of the user to a security system. Thereby, the user can inform the security system of his danger even if the user is having difficulty in inputting an alarm button or is on his movement, and can operate the image input apparatus at will without limitation of position.