High rise buildings need marking as local civil aviation norms. High, medium and low intensity aviation obstruction warning lights make these engineering marvels conspicuous during day as well as night time. Low intensity lights are used for structures having height less than 45 meters. Lights for high rise structures require good protection against harsh weather and against lighting. These days building are being constructed as near as possible to airport vicinity & therefore needs to be marked with obstruction light and maintained regularly for continuous operation.