After a cat-and-mouse session with the pendant lamp, it's time for a new lampshade, and don't forget to buy the original mud-blown glass ones. OBS - Please note the difference between the bottom bowl and the lower shade. Lampshades for the classic PH 4½-4 Glass Pendant Lamp, designed by Poul Henningsen.
The PH 4½-4 pendant lamp is designed on the principle of a reflective multi-shade system, which is based on a logarithmic spiral, where the focal point of the light source is placed in the centre of the spiral. The mouth-blown three-layer opal glass, which is glossy on the outside and sandblasted on the inside, emits a soft and diffused light.See the different PH lamps here.