An artificial cove open to either the ceiling or the wall, wherein the light source is, be it florescent or LEDLED
Modern point light source (Light Emmitting Diode)
, is hidden and provides an indirect illumination of the room.

From the main ceiling removed translucent plane, which covers the light source. The translucent plane can be of a variety of materials, such as glass, acrylic, or cloth. The planes can be composed of either structured or unstructured frames, color frames or constantly changing color backdrops. Light planes are usually designed to adapt its colors to the environments physiology and the time of day.

Similar to light planes, light walls and floors are illuminated surfaces where the light source is hidden behind the translucent plane. When planing light floors, one needs to take into account structural requirements. Function and usage limitations need to be taken into consideration by the lighting designers.

Light washers placed in line along a wall to illuminate the same. Either flourescent or LEDLED
Modern point light source (Light Emmitting Diode)
.

Exposed florescent tubesflorescent tubes
General term for florescent lightsources in tubular form. Typically used for simple illumination applications and light advertisements.
on ceilings, walls, or hanging in rooms. The tubes can be of linear style or can be manipulated into any form by a skilled glass blower.

Can be realized very effectively with the help of LEDs.