Telescope block (light extender)

Pretty simple idea really, basically this idea will allow lightsources to acts sort of simular to sunlight. You'd place this new Telescope block (that would look like a thick glass looking block) next to a lightsource to extend the light in a single direction up to 50 blocks. The distance of the light depends on the light source being used. When the light comes in contact with a surface, depending on how close the surface is will determine how far the light will scatter. Basically, think of it telescope creating a sort of beam of light, and when that beam of light touches something it creates an invisible torch. Completely covering a light source with this new block (including the corners) would turn would extend the light so much to where its able keep a 50 by 50 block room at the same lightlevel as the light source block itself. This could be extermely useful for players with big rooms and either dont want to place torches everywhere, and dont have good ways to hide the torches without ruining their builds