The present invention provides a light guide plate (500) including a transparent plate (220) having an emitting surface (524) with a plurality of hemispherical embossments (540) formed thereon continuously side-by-side in rows and columns. The transparent plate also has a bottom surface (226) opposite to the emitting surface, with a plurality of hemispherical embossments (260) formed on the bottom surface. The embossments of the emitting and bottom surfaces all face in a direction away from the transparent plate. Other embodiments are also provided.