The Housing Development Board HDB has called for the use of sunlight as a lighting or energy source for underground space. HDB's request documents describe that HDB is looking for new solutions that can reduce the overall energy costs, reduce the amount of space and solutions needed for artificial lighting and required lighting systems during the day, and provide the same solutions as existing LED solutions. Or better light distribution scheme. The document added: "Because there are no ready-made solutions, the HDB proposes to collaborate with the private sector to develop systems for solving the lighting of underground spaces. The sun can be used to provide power for artificial lighting or to introduce natural sunlight into underground space. â€
The document also said: "In addition to improving the energy efficiency of underground space, the proposed solution will also help the maintenance cost of the town." The document is an innovation of public-private partnerships, and the project is open to all companies and will give SMEs more The basis of support. At present, some countries, such as Japan and South Korea, have adopted the light pipe system, which helps reflect sunlight from the roof and introduces natural light into the underground space. The building's zero-energy buildings also use a similar system to transmit sunlight indoors.
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