ROBERTSON 3P20087 RSZ108T5120 /A Fluorescent eBallast, for 1 F8T5 Linear Lamp, Preheat Rapid Start, 120Vac, 50-60Hz, NPF The RSZ108T5120 /A replaces the following ROBERTSON models: L204S, L4, L48 (4,6,8W), L6, L8 Equivalent to: Philips-Advance RMBB1P13, Hatch HR8X1T5, Fulham WH1120L, Keystone KTEB-108-1-TP-FC Save 44% and order the Quik-Pak of 10 individually packaged ROBERTSON units: 2P20087 RSZ108T5120 /A Two Year Factory Warranty-ONLY if the Amazon Seller is ROBERTSON WORLDWIDE. Take advantage of ROBERTSON's 60 years of electronic design and quality manufacturing experience