what are the balls in power lines for
Balisor High voltage power cables, particularly those close to airports, need to be visible day and night. During the day, brightly coloured balls positioned along the length of the cables are sufficient, but during the night, lighting is necessary. These beacons provide this lighting by glowing red, the standard colour used in aviation for warning beacons.
Rugby league playing field Rugby league is played on a field 112–122 by 68 metres[1] (122.5–133.4 × 74.3 yards). The longer boundary lines are touch lines, while the shorter boundary lines are dead ball lines.[1] The touch lines and dead ball lines are out of play.[4]