Energy savings, compact size Philips Linear Compact Fluorescent Lamps offer designers, specifiers and end-users new levels of efficiencies and versatility in sizes,configurations and application possibilities. With so many elegant fixtures available to complement their small size, high light output and advanced technology, Philips Energy Advantage lamps are fast becoming the preferred choice when maximum effciency and sleek design solutions are required. 20% energy savings when compared to PL-L 40W;Sustainable lighting solution - only 1.4mg of mercury per lamp;Direct replacement for PL-L 40W lamp - no new ballast required;Instant Start ballast*;* On Instant Start ballast - a Standard PL-L 40W only draws 32 Watts, so the actual savings is 7 Watts (32W - 25W = 7W)