Highlights Universal Energy savings of 50% Lifespan of 30,000 hours Quick return on investment Flikker-free Cool white - 4000K 3-year all-in warranty Universal The UN in this product's name stands for universal and that means that this Philips CorePro LEDtube is suitable for fixtures that have an electronic ballast (ones without a starter) as well as ones that have a conventional ballast (ones with a starter). Energy savings of 50% This LED tube only uses 18 watts of power to replace a fluorescent tube that uses 36 watts. That means savings of at least 50% in energy costs throughout its entire lifespan. It has an A+ energy label. Lifespan of 30,000 hours While a fluorescent tube like this normally has a lifespan of 20,000 hours, this CorePro LED tube boasts a lifespan of 30,000 hours. That means if it's on for 12 hours a day, 5 days a week, it'll last around 10 years! Quick return on investment Even though LED tubes are a little more expensive to buy initially, the cost can be quickly earned back due to better energy efficiency. This is often within 2 years (depending on use) and, of course, you'll continue to save money throughout the entire lifespan of the product. Flicker-free Fluorescent tubes don't just flicker when they start up, they continue to flicker as long as they're switched on. It may not be noticeable for most people, but for some flickering can cause headaches and other health problems. Fortunately, LED tubes don't flicker. Cool white - 4000K This Philips LED tube has a colour temperature of 4000K and emits a cool white light that helps to keep people focussed and alert. That's why this colour temperature is often chosen for use in offices, for instance. 3-year all-in warranty The Philips CorePro LEDtube is covered by an all-in warranty of 3 years.