Pair of 1970s "Fat Lava" brown and off-white ceramic wall lights or sconces which were manufactured by Hustadt Leuchten Keramik in West Germany. The 'Fat Lava' bubbled glaze emulating lava is particularly prevalent around the outer edge of the wall lights and around the raised chrome bulb holder.  I only have two of this specific design which can be used as two wall lights perhaps in a living room or for either side of the bed but if you have more they can be connected together to create a mosaic effect across the wall.  There is a small notch on the edge of the top and bottom of the light for the wire to go through to connect each wall light together.  

The wall lights do not have a maker's stamp or label.  I researched their provenance to be that of Hustadt Leuchten Keramik in West Germany.

A single E27/E26 lightbulb preferably with a chrome top (see images) is required which helps to reflect the light beautifully across the wall behind.  Rewired by a professional electrician and in full working order.  

Dimensions: Height: 26 cm Width: 28 cm Depth: 13 cm  

Wikipedia's description of Fat Lava:

West German Art Pottery is essentially a term describing the time period of 1949–1990 and became the early way to describe the pottery because the country of origin, with numbers denoting the shape and size, was often the only "mark" on the base. Even though company names are now better known, and many items are attributed to specific makers, the more generic term "West German pottery" remains in common use. "Fat Lava" is a popular term that strictly refers to a fairly small subcategory of glazes but is all too often improperly used as a synonym for West German pottery.

https://retroliving.co.uk/collections/lighting/products/pair-of-1970s-german-hustadt-brown-ceramic-wall-lights