UT 128 WR T5 U-Type Acrylic Diffuser Luminaire 1x28w Housing High quality cold-rolled steel sheet Diffuser high quality acrylic diffuser with steel painted frame. Lamp Holder Heavy duty rotary-locked type (G5) lamp holder (TIS.344-1987 Standard) Wire Cable THW 1.0 sq.mm. 70'C (TIS.11-1988 Standard). Optional: 105'C 18AWG UL Standard. IP Rating IP20 Installation suitable for general purpose with high efficiency requirement