... .Color temperature:3000K 4.Base:P28S 5.Overall length:130mm quartz halogen lampsRelated Products: CSANSILIFVWBaseAverage life(h)LMKDiameter(mm)C1301BTM 120500P28S15013000310020C1302BTL ... shapes such as biplane,monoplane,coiled coil and M-shape.quartz halogen lamps120V 500W P28Shigh luminous efficacy,long lifetime BTL 120V ...