a liquid cooled led lighting device includes a sealed housing containing an led element that emits light . cooling liquid is contained in the housing to disperse heat generated by the led element . an enclosure containing compressible material is preferably immovably positioned within the housing and outside of the optical path of the emitted light . the enclosure containing the compressible material compresses in response to expansion of the cooling liquid as it absorbs heat from the led element . advantageously , the cooling liquid and the enclosure containing the compressible material act to more efficiently cool the led element , thereby providing higher light output and increased lifetime of the led element .