![]() ![]() When first started, it is necessary to provide a significantly higher voltage than normal to cause the internal arc to strike, and once started, the current must be limited to a safe value for the tube. The way a fluorescent lamp works is very different from a simple incandescent lamp, and modern fluorescents (especially the compact fluorescent lamp, or CFL) make use of electronic ballasts to regulate the voltage across the lamp, and the current through it. It's not covered here, because this is about how they work, rather than a discussion of the way fittings are wired. There are alternative ballast schemes used (such as the 'lead/ lag' arrangement) and this is shown in the previous article. In this article, we'll shine a light on the problems with modern lighting and what you can do to avoid the risks.įrom Incandescent to Fluorescent and LED: How Modern Lighting Worksīefore we dive in, you need to understand a bit about the history of artificial lighting and how it works.The article Traditional Fluorescent Tube Lamps & Their Alternatives looks at the operation of fluorescent lamps in fairly simple terms, but here we will examine the lamps, their ballasts (both 'traditional' magnetic and electronic types) and delve a little deeper into their inner workings. Sadly, most people are unaware that lighting in our school, work and home environments has a huge impact on health and productivity. Not to mention the bright screens we constantly stare at. If we add up all the hours we spend working indoors over a lifetime, our exposure to these intense artificial light sources is alarming. However, we're light-sensitive beings so lighting really is everything to everyone!Ĭhildren spend up to 7 hours in school classrooms under artificial lighting, while adults can spend 9-10 hours a day in harsh office lighting. "Lighting is everything.” It's a line you've probably heard photographers or models quoting. South Georgia & South Sandwich Islands (GBP £) ![]()
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