If you make multiple cone quickly (see small porcelain lamps) you can make them strick together. After firing they form a strong semi ball. On the flat side LEDs can be mounted. This gives a really nice light effect!

bunch of cones stick together with LED lighting

bunch of cones stick together with LED lighting

wall version of cone light (off)

wall version of cone light (on). Note red stained porcelain also has red LED.

hanging version of cone light (off)

hanging version of cone light (on)

bunch of cones stick together

hanging version of cone light (back)

hanging version of cone light (front)