These are called linear suspended profile lights. they come in various lengths like 4', 6' and 8' and generally come in black or white fixture colour. They can be customised on length and finish too. The best way to use them would be by hiring a designer. We can help you in that front.

profile light

Greetings From Dream Design, As per your Inputs we are suggestion you some ideas -Pls see the reference image these are luxurious ones

3 walls and Ceiling with  cream pie COLOUR CODE: L152 One back wall of sofa with  hidden ravine COLOUR CODE: 8393 ( Asian Paints ) For this size of Room 4 Nos. 12w panel lights in Ceiling. 3 Nos. 5w Spot Lights for any one wall. 1 No. LED profile light for wall paneling  Wooden floor and