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Significant underestimates of cooling loads can result from the use of rural temperature data. This guide presents the results of long-term measurements of air temperatures at 80 sites around London and includes on a diskette a design tool to allow the designer to modify Bracknell temperature data. It also outlines techniques to reduce the effects of the Central London heat island by careful design of the building and its surroundings.

Lighting is one of the largest users of energy in buildings, being responsible for around 20% of electricity use. Good lighting is essential to health, well-being and productivity, but the efficiency of light sources varies widely. To reduce carbon emissions, designers, owners and occupiers are looking at the energy efficiency of lighting. Light-emitting diodes (LEDs) are a proven technology that offers enormous possibilities for providing highly energy-efficient and good-quality interior lighting. This BRE Trust Report summarises the current LED market and various advantages of LEDs, and...