... T8 tubes. Environmental and energy saving T5 adapter 28W 21W 14W 1.T8 to T5 transform aluminum alloy,polished/matte/Spray-painting ... efficiency,high CRI,high energy saving rate.3.Multiply types to export all over the world:HE Serie:14W,21W,28W ... result in arcing and excessive heating of the socket. Specification description 1Model: T5 adapter 28W 21W 14W 2Base Material: Aluminum Alloy3Input voltage ...