... Specification Wattage Available7W,9W,11W,13W,15W,18W,20W,23W,26W,30WDiameter of Tube7mm,9mm&12mmRending IndexRa≥80Color Temperature2700K,4100K,6400K ... Lamp 4U Series --------- - Specification Wattage Available9W,11W,13W,18W,23W,26W,30W,32W,35WDiameter of Tube7mm,9mm&12mmRending IndexRa≥80Color Temperature2700K ...