The stuff for making the airports safe and have all the stuff required by FAA or Federal Aviation Authority are varied and many. Usually the agency and its personnel inspect all the stuff put up by airports and their management before the system is used. It means that complete sets have to be operable before licensing and approval for operations are given.
The FAA is the regulating body that makes all kinds of rules that makes for the zero accident process in flight or on ground. For the commercial airlines and related outfits and the physical facilities that receive them, things like medium intensity tower lighting work for their safety. The lights on towers are often the most important items that guide aircraft on to the ground.
For instance, a plane may approach the busiest of international airports at night. It might be near a city which has an intense kind of lighting of its own, taken in total and with the mass of buildings and streets that are open with lighting. The kinds of things which are going to be needed have to be in combination in relation to other outlying areas.
The intensity factor might be varied to enable operators to have all sorts of details related to obstruction and even weather items. For instance, lighting with flash frequencies could signal wind factors on the ground. A plane and its pilot may have automatic monitors but on board adjustments to speed could be refined by details provided for ground factors.
The tower personnel are not able to give out these details as they themselves have to concentrate on their work. The lighting systems in use have various controls and flows which enable them to be used flexibly. Medium intensity candela concerns is a thing that was required in an earlier era to help keep friendly relations with neighbors.
These days, the variance is something that might save on energy consumption or needs. Also, the detailing could be helped along with the variable use of intensities and colors for lights. Reds are useful at night but white light is something that will not distract or discomfort people on the ground and the like.
Towers are usually sturdy enough to withstand weather disturbances and so will the light fixture casings. The fixtures themselves have qualities which enable them to withstand water and snow and wind. The patterns on ground level as seen from above could be something that guides in experienced pilots or the well trained ones.
There is an international standard for signals in this range that might be in use for all airports. The lights are usually operating on several platforms that helps them achieve maximum exposure and also be in constant use as needed. For most it means that there are back ups and back ups to back ups.
All the systems are constantly monitored and checked for damage or low energy levels so that they are constantly in service. Because their being there at the right moment is vital for airport safety. And airports in this country seen without these can be temporarily shut down.