BTV-T5 T5 Taper Batten Type Luminaire Housing High quality cold-rolled steel housing of thickness 0.6 (T6) or 0.8mm (T8) Lamp Holder Heavy duty rotary-locked type (G5) lamp holder (TIS.344-1987 Standard) other lamp holder typs are available 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