Patent ID: 7182484

Claim:
A light appliance and a cooling arrangement, comprising: a) a light appliance; b) a liquid-tight enclosure for the light appliance that gives off unwanted heat into surrounding air within the enclosure during operation, the enclosure having an external wall at least part of which is thermally conductive; c) an electrical driver within the enclosure comprising an electrical or electromagnetic device for converting voltage or limiting current to the light appliance or for both connecting voltage and limiting current to the light appliance; d) an air circulating device within the enclosure for circulating air, heated by the light applicance or by the air circulating device, to the thermally conductive portion of the external wall; e) a medium that is in contact with said external wall of the enclosure; the medium (i) having adequate thermal conductivity and (ii) being sufficiently cooler than the external wall of the enclosure that the air circulating device removes sufficient heat from the air by dissipating the heat into the cooler medium through said thermally conductive portion so as to substantially increase lifetime of the light appliance; f) the enclosure being free of a channel formed between an interior surface of the external wall of the enclosure to receive forced air heated by the light appliance and a sleeve liner surrounding the light appliance, for controllably recirculating forced air within the enclosure; g) the external wall being free of multiple heat fins extending between an inner surface of the external wall and the sleeve liner; and h) the enclosure being free of a one-way air valve that opens a passage into the interior of the enclosure from the exterior of the enclosure when the pressure on a portion of the valve at the exterior of the enclosure exceeds the pressure on a portion of the valve at an interior of the enclosure.