Retrofitment Type 5 W Tubular Led Lamp For Use In Existing Cfl Fitting Of 11 W 4 Pin Holder Tl And Ac Coaches With Built In Driver Internal To The Led Tube As Per Type C Of Icf Spec. No. Icf/Elec/960, Rev.0 With Cs1, Cs2 & Cs3 Or Latest. However, The Firms May Quote For Latest Specification/Drawing With Amendment If Any Issued By Rdso/Icf/Rcf.