| http://www.w3.org/ns/prov#value | - c lights may be used in place of the halogen lamp.) The lamp is cooled by the combination of a fan 14 mounted in a side wall of the housing (which is similar to the kinds of fans commonly used to cool personal computers) and fins 16 projecting from the housing, that act as a heat sink to conduct heat away from the lamp to the surrounding air, where it is carried away by convection.
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