... 3.180 degree rotating lamp base 4.Base:G23, G24, E27,B22 9W LED PL G23 lamp Item4-pin pl led ... A. Basic commercial lighting;B. Generally matching in downlight, celling light, household lighting etc;C. Shopping, lighting, specialty lighting, ... hotel lighting, office lighting, home light;D. Commercial show windows and bars, airport, subway, cloverleaf junction ...