It was pretty amazing how the seminar was smoothly conducted with the help of emergency lights. I still remember that chaos reigned immediately after the power failure and how the organizers ran around frantically searching for the mechanics in charge of arranging an alternative supply. The Led Emergency Lights were brought in and the hall lit up again. It is truly marvelous the way these battery operated lights work efficiently for hours. They are equipped with automatic switches which can change over from AC supply to battery power. This is why there is no ON or OFF switch, to eliminate the chances of accidental switch off. The warranty offered is nine months for the battery and three years for Led.