Sylvania DULUX D ECOLOGIC lamps are long-life, energy-saving alternatives for incandescent lamps. When paired with Sylvania ECOLOGIC linear fluorescent lamps, all the fluorescent lamps in an installation will be TCLP compliant. More compact than the DULUX S ECOLOGIC lamps, the 9-Watt and 13-Watt 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.