The Philips LED tube light, on the other hand, consumes just 10.5 Watts in total. That's an energy-saving of over 70%. This translates into an electricity cost saving of about $37 per year for every tube upgraded. This example assumes 12 hours per day of operation and an electricity tariff of $0.25/kWh. Installation Guide - 4 Foot (1200mm) LED Key Specification. 1200mm 18W T8 smd led light tube. 1.Energy saving much more. 2.Long life time,18W. 3.Less CO2 consomption. ghting Source: 7-7.5lm/led, (CE&Rohs) 1200mm 18W T8 smd led light tube. We Yuli. who one of a professional LED products manufacture in China.Split T8 4ft Led Tube Light 1200mm 18W Led Fluorescent Light Lamp Double Ends Input AV 6500k 4500k 3500k (Cool WhiteK, Clear Cover) Currently unavailable. We don't know when or if this item will be back in stock. Special Feature. Electronic ballast and starter have to be removed, Replacement old fluorescent tube,LM, Split led tube.