A light guide comprising a light guide body plate having a first main surface and a substantially parallel second main surface opposite to the first main surface and separated therefrom in a vertical direction by a thickness of the light guide body plate, the light guide body plate being made of a light guide material having a first refractive index, and comprising a plurality of elongated light channels extending substantially parallel to each other and to the first and the second main surfaces; the light guide comprising an out-coupling arrangement for coupling light propagating in the light channels out of the light guide body plate through the first and/or the second main surface; wherein, in a horizontal transverse direction being a direction parallel to the first and the second main surfaces and perpendicular to the longitudinal direction of the light channels, each light channel is confined between two confining stripes formed of a solid confining material having a second refractive index lower than the first refractive index by a refractive index difference to enable total internal reflection at interfaces between the light channel and the confining stripes, confining stripes between two adjacent light channels having a height less than the thickness of the light guide body plate so that the light guide body plate forms a continuous structure; wherein the light guide body plate comprises a first and a second plurality of light channels (320, 380) in accordance with the plurality of light channels defined above, the light channels (320, 380) of the first and the second pluralities of light channels being directed at an angle with relation to, and crossing with each other; the confining stripes having a maximum width in the horizontal transverse direction; the confining material being selected to produce, for the maximum width of the confining stripes, optically clear confining stripes with transmittance of at least 80 % and haze value of 30 % at maximum for the visible wavelength range; the height of the confining stripes between two adjacent light channels covering 50 to 90 % of the thickness of the light guide body plate; and wherein the refractive index difference is less than or equal to 0.2, preferably less than or equal to 0.1. wherein, in a horizontal transverse direction being a direction parallel to the first and the second main surfaces and perpendicular to the longitudinal direction of the light channels, each light channel is confined between two confining stripes formed of a solid confining material having a second refractive index lower than the first refractive index by a refractive index difference to enable total internal reflection at interfaces between the light channel and the confining stripes, confining stripes between two adjacent light channels having a height less than the thickness of the light guide body plate so that the light guide body plate forms a continuous structure; wherein the light guide body plate comprises a first and a second plurality of light channels (320, 380) in accordance with the plurality of light channels defined above, the light channels (320, 380) of the first and the second pluralities of light channels being directed at an angle with relation to, and crossing with each other; the confining stripes having a maximum width in the horizontal transverse direction; the confining material being selected to produce, for the maximum width of the confining stripes, optically clear confining stripes with transmittance of at least 80 % and haze value of 30 % at maximum for the visible wavelength range; the height of the confining stripes between two adjacent light channels covering 50 to 90 % of the thickness of the light guide body plate; and wherein the refractive index difference is less than or equal to 0.2, preferably less than or equal to 0.1.