The veneers are selected to give the best wood grain effects when illuminated and all have been sourced from forests certified by the Forest Stewardship Council - FSC. Nothing comes close to the beauty of these veneers as a diffusion material and no other veneer treatment gives the strength and the protection to the material without sacrificing the delicacy and subtleness that this natural material communicates when illuminated. Wood is a natural material, and gradual changes in tone may occur over time. Furthermore, if the lamps have been purchased at different times, there will be differences in color and tone, particularly in the light-colored veneers.