In an informal test of solar lights carried out by The Economist in Africa, users grumbled about the soapy quality of light and lantern-style design.

ECONOMIST: Solar lighting

At the end of the project the Opera again forced him to compete with other architects, this time to design a lantern for the dome's top.

FORBES: Dome of the Brave

Although Alberto needs no diagram or carving kit to create his jack-o'-lantern, he recommends the novice carver design a face on paper before beginning.

CNN: Carving up a spooky Halloween