TUNGSTEN HALOGEN VS LED: WHAT'S THE DIFFERENCE?

摘要

According to atg airports' global LED AGL survey, the demand for LED technology on airfields is increasing. It forecasts an increase in the number of LED AGL projects in the next two to three years as airports strive to reduce operating costs and find solutions for reducing carbon emissions. However, the question remains are LEDs the universal replacement for tungsten halogen lamps in airfield lighting circuits? The idea of the electric light bulb, which has been used at some time in all airfield lighting systems, has been around since Sir Humphrey Davey invented the first electric carbon arc lamp in 1801. These early 'light bulbs' didn't last for any substantial length of time, but over the following years inventors refined the development using a metal filament inside a glass bulb containing a vacuum. It was found that heating the filament with electric current to around 1,000°K caused it to glow and produce light. Such lamps have gone through many iterations to deliver improvements that today provide a usable light output with a reasonable life expectancy of the filament.