Sylvania DULUX® D Ecologic® lamps are long life, energy saving alternatives for incandescent lamps. When paired with Sylvania linear Ecologic® lamps, all the fluorescent lamps in an installation will be tclp compliant. More compact than the DULUX® S Ecologic® lamps, the 9 and 13 W DULUX® D Ecologic® lamps are ideal for retrofitting existing fixtures and for use in dedicated, energy saving fixtures where a small overall length is required. DULUX® D Ecologic® 18 and 26 W lamps are used in dedicated fixture designs where high light output and maximum energy efficiency are required. They may also be used for retrofiting existing fixtures.