Aircraft Warning Lighting Singapore : Collision Avoidance
Aircraft Warning Lighting Singapore are high-medium-low intensity lighting devices. These light attached to tall building or structures. It used as collision avoidance measures. This devices make high structures more visible to passing aircraft. Especially at night. Eventhough they may be used during the day as well. These lights need to be of sufficient brightness in order to be visible for miles around the structure.
These days to take off or landing aircrafts are far more strict than they used to be. Airport usually located near or in the middle of city. There are also have low flying helicopters (police, journalist, paramedic etc). So we really need for lights to be there. We have a long history of supporting flight operations and how to make them safer today.
According to FAA Advisory Circular (AC) 70/7460-1 :
“Any temporary or permanent structure, including all appurtenances, that exceeds an overall height of 200 feet (61m) above ground level (AGL) or exceeds any obstruction standard contained in 14 CFR part 77, should normally be marked and/or lighted.”
Aircraft Warning Light Specification
Low intensity lights are required to be installed at high structures which are more than 45 meters AGL (Above Ground Level).
Medium intensity white strobes are usually used on structures that are between 200–500 feet (61-152.4 meters). If a medium white strobe is used on a structure greater than 500 feet (152.4 meters), the structure must be painted. The common medium white strobe flashes 40 times in a minute, at an intensity of 20,000 candelas for daytime/twilight, and 2,000 candelas at nighttime.
A high-intensity white strobe light is used on structures that are taller than 500 feet (152.4 meters). These lights provide the highest visibility both day and night. High-intensity strobe does not provide 360˚ coverage; this requires the use of at least 3 high strobes at each level. On the other hand, it reduces maintenance costs (i.e. no painting).
If the structure has an antenna at the top that is greater than 40 feet, a medium-intensity white strobe light must be placed above it rather than below. The common high white strobe flashes 40 times in a minute, at an intensity of 270,000 candelas for daytime, 20,000 candelas at twilight, and 2,000 candelas at nighttime