Sylvania Dulux D/E Quad Tube Compact Fluorescent Light Bulbs
Sylvania Dulux D/E quad tube compact fluorescent have been used in recessed lighting and a variety of other dimmable applications. Sometimes these are also called Dulux DD/E, Biax or PL-C lamps. Typically used with electronic ballasts and very energy efficient. The real plus is the ability to dim these lamps when used with a dimmable ballast only. The 4 pin configuration fits specifically with socket that is made for this type of lamp only.