... lifetime50000h2]. Features No shadow in connect place of 2 tubesNo black head phenomena at allCan be arbitrary angle ... for optional]- 1pc4] White Switch on Tube Aluminum [for optional] - 1pc5] 2 clips with 2 screws 6] Install guide book4]. Application:1 ... . Supermarkets, hotels, restaurants, School, hospital, factory,2. Exhibition hall, meeting room, office, shopping mall;3. Ideal ...