Satco Satco S8308 4100K 9-Watt G23 Base T4 Twin 2-Pin Tube for Magnetic Ballasts

Size:Bright White (4100K) | Style:9Wt=45Wt Fluorescent lamps are phosphorous-coated tubes filled with a low-pressure mercury vapor. Light is produced by passing an electric arc between tungsten cathodes at opposite ends of the tube. This causes the mercury vapor to generate a radiant energy.