Stop using old 18W compact fluorescent bulbs. Save up to 70% on your energy costs with these 6.5W LED PL-C bulbs as a replacement. The Philips CorePro PL-C LED is the perfect alternative to a standard 18W PL or Dulux lamp that has a base with 4 pins. These bulbs are energy-efficient, have a long lifespan, and can be widely used for all kinds of spaces.These are the benefits of the Philips CorePro PL-C LED 6.5W 840:Energy savings of up to 70%High lumen / Watt efficiencyHigh quality of lightRotatable end capsInstant 100% light / no flickerEfficient distribution of the lightUp to 30,000 burning hours (3 times as long as a conventional PLC lamp)Lower maintenance and replacement costsSimple 1 to 1 LED replacementFree from harmful substancesEnvironmentally friendly 4-pin fitting Four-pin fittings are often used in conventional ceiling fixtures such as downlights. Let's keep it simple. If your current bulbs have a 4-pin socket, make sure your replacement LED lighting also has a 4-pin fitting. By choosing the energy-efficient PL-C LED bulbs from Philips you can save up to 70% in energy! Long Lifespan and warrantyThe reliability of Philips lighting has been proven for decades. With a lifetime of 30000 hours, this is the perfect solution for years to come. That means, in an average business environment, it will last approximately 12 years (52 weeks per year, 10 hours a day from Monday to Friday). By comparison, a standard PL or standard Dulux lamp only lasts 10,000 hours. For extra peace of mind, an all-in Any-lamp.co.uk warranty of 3 Years is included too. Cool White LightA high Kelvin value means a cool colour. This PL-C LED Lamp has a color temperature of 4000K and therefore gives cool white light. This light colour helps to keep people focused and alert. That\'s why it is very suitable for the illumination of public places like hallways and offices.Which ballast do I need?A 4-pin energy-saving lamp works with an electronic (HF) ballast. This ensures that the correct amount of electricity reaches the LED PL-C Lamp. In that way, you have instant light and no flickering.Install and save with easeSwitch off the power and remove the old PL or Dulux lamp from the fixture. Install the new LED bulb Switch the power back on and start saving on energy costs! Don't forget to hand in your old energy-saving bulbs for recycling.