The question of leaks is directly addressed, although roof material isn't mentioned: "You fix the bottle in with polyester resin. Even when it rains, the roof

The question of leaks is directly addressed, although roof material isn't mentioned: "You fix the bottle in with polyester resin. Even when it rains, the roof never leaks - not one drop." Questions of durability are absent, but with the number being deployed, answers should be available shortly: "In the Philippines, where a quarter of the population lives below the poverty line, and electricity is unusually expensive, the idea has really taken off, with Moser lamps now fitted in 140,000 homes."