... lamp,95W,single-endedD,OD 15MM,ozone produceYozone freeW,tube length is 1550MMFor exampleZW95D19Y-Z1554 stands for:UV germicidal ... lamp,150W,single-endedD,OD 19MM,ozone produceYozone freeW,tube length is 1554MMFor exampleZW65S15Y-Z1554 stands for:UV germicidal ... lamp,150W,double-endedS,OD 15MM,ozone produceYozone freeW,tube length is 1554MM Double-ended one pin UV germicidal lamps