41.   Because the arena uses a mercury lighting system, it takes the lights some time to cool off before being relighted.

42.   During this time, a new ventilation and lighting system has been fixed inside the sepulchral chambers, deep inside the pyramid.

43.   He said the government also had installed a new lighting system, as well as a closed-circuit television system to improve security.

44.   In response, the government ordered that the runway be enlarged and its lighting system improved.

45.   In the older museum, the electrical lighting system blinked, the roof leaked and the air conditioning was flawed.

46.   Initial reports said the fire was started by a short circuit in the lighting system.

47.   Initial reports said the fire was started by a short circuit in the lighting system or by an exploding cylinder of cooking gas.

48.   It also could influence the development of new wireless devices, such as radar systems to help automobiles avoid collisions, and new semiconductor-based lighting systems.

49.   It leaks in the rain and the lighting system is unwieldy.

50.   Repairs will include fixing the cracks in its blocks and giving it a new lighting system and new stairs.