what are the lights on the curling stone
Curling A handle is attached by a bolt running vertically through a hole in the centre of the stone. The handle allows the stone to be gripped and rotated upon release; on properly prepared ice the rotation will bend (curl) the path of the stone in the direction in which the front edge of the stone is turning, especially as the stone slows. Handles are coloured to identify each team, two popular colours in major tournaments being red and yellow. In competition, an electronic handle known as the eye on the hog may be fitted to detect hog line violations. This electronically detects whether the thrower's hand is in contact with the handle as it passes the hog line and indicates a violation by lights at the base of the handle. The eye on the hog eliminates human error and the need for hog line officials. It is mandatory in high-level national and international competition, but its cost, around US$650 each, currently puts it beyond the reach of most club curling.
Curling at the Winter Olympics Curling was included in the program of the inaugural Winter Olympic Games in 1924 in Chamonix[1] although the results of that competition were not considered official by the International Olympic Committee until 2006. Curling was a demonstration sport at the 1932 Games, and then again after a lengthy absence in 1988 and 1992. The sport was finally added to the official program for the 1998 Nagano Games.