ROBERTSON 3P20166 PSP2GPH40HOIVDWM Electronic Ballast for 2/1 GPH212T5HO thru TUV75WHO UV Lamps, Program Start, 100-277Vac, 50-60Hz, HPF Save and order the 2P20166 Quik-Pak of 10 units individually packaged Replaces ROBERTSON models: NES2060425P /A, NES2060426P /A, NES2060436PB1 /A Replaces ROBERTSON models: NES20604P /B, NES20604P /C, NES20604P /E PSP2GPH40HOIVDW replaces ROBERTSON models: NES20604P /F, NES20604PBIVHO/B Visit RobertsonDirect.com for complete technical data.