Aspiro 8000 - Natural Birch. Secto Design lamp shades are handmade entirely in Finland of PEFC-certified Finnish birch by highly skilled craftsmen. Bulb recommendation (EU): energy-saving 20-30 W tube-shaped bulbs, base E27 (max. 60 W). The cable used for pendant lamps is heat-resistant. Pendant lamps have a ceiling plug. The cable length is 150 cm. Shorter and longer cables are available for pendants, at extra cost.