Used with a reflector bulb it will cast dramatic lighting effects over the surfaces they are fixed from via the fluted sides

Internally is an earthed cast ceramic wiring block

Energy Rating - A++

Fortunately

they have a M10 ( 10mm ) thread which is a direct swap for most table lamps/wall lamps

porcelain wall socket yellow schuko tools & utensils Used with a reflector bulbModern 2 pin wall socket manufactured in Europe by Katy Paty. This one is a direct colour match for the wall switches. They are made of traditional porcelain which is engrained and abrasion resistant. The colours are constant and, unlike colours of plastics they are UV and Dust resistant. Constant colour and highly abrasion resistant surface. Enamelled and handmade in a top glossy quality. CE conformity certificate available on request. Decorative