Adding coloured and focused lights (like RTX but more accessible)

Using the new crystals and telescopes system could you add placable lenses . The placable lenses would be normal, concave or convex; convex focusing the beam to a small point and making the light more concentrated, the more you place the smaller and brighter the point gets; concave does the opposite, enlarging the beam and making it fainter; and lastly the normal does nothing except what I shall explain next! Maybe you could get colours lenses by using the coloured crystals, instead of using a discoloured or white crystal. This is assuming that there will be several different colours of crystal if not its still a feature I have been longing for ever since RTX was shown as it adds so many possibilities for vanilla maps, survival world and aesthetic builds.