BTF 236 WS T8 Taper Batten Type Luminaire 2x36w Housing High quality cold-rolled steel Lamp Holder Heavy duty rotary-locked type lamp holder (TIS.344-1987 Standard) other lamp holder typs are available Rotary-locked type holder(G13) = WR , Waterproof type lamp holder = WP Wire Cable THW 1.0 sq.mm. 70'C (TIS.11-1988 Standard) IP Rating IP20 Installation suitable for general purpose with high efficiency requirement