PHILIPS ENERGY SAVER ESSENTIAL 18 WATT COOL DAYLIGHT B22 PC The PHILIPS ENERGY SAVER ESSENTIAL 18 WATT COOL DAYLIGHT B22 PC delivers energy efficient lighting with brilliant performance. The remarkable 18 watt light offers a cool daylight hue, making it perfect for work or study. This energy saving bulb will reduce energy consumption by up to 80% compared to traditional lighting sources.