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Triple turn compact fluorescent CFL PLT light bulb with a GX24d-1 2-pin square push fit base. Compact, high efficiency and long life light bulb typically used in downlighters etc. Not suitable for dimming. Also known as Sylvania Lynx-T, Philips Master PL-T, Osram Dulux T or GE Biax T.Need more help in choosing a suitable light bulb? Read our guide Choosing Compact Fluorescent Lamps