When designing a home, Simmons creates a lighting plan for each space depending on the function of each room.

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Living and sleeping spaces circumnavigate the circular plan to provide copious natural lighting.

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It's a plan with the bonus that less lighting means a cut in harmful CO2 emissions - and town halls are obliged by law to reduce waste.

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The same team assessed the entire museum (150, 000 square meters of lighting, heating, electrical and ventilation systems) and came up with a seven-year plan detailing when the equipment would have to be replaced and how much it would cost annually.

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