Patent ID: 8779661

Claim:
An electric light lamp comprising in combination: (i) a base to which are mounted electrical supply contacts for the lamp, (ii) a ballast mounted within the base, (iii) electrical supply leads extending from the contacts to the ballast, (iv) a post extending axially from the base, (v) a light emitting semiconductor sealed within an at least partly translucent capsule mounted to the post and connected electrically through the post to the ballast, (vi) the capsule being at least partly surrounded by a thermally conductive translucent liquid container mounted to the base, (vii) heat conducting liquid filling the container to provide a first thermal passage from the chip through the liquid to the exterior of the container, (viii) thermally conductive material being provided around the ballast and along the post so as to provide a second thermal passage from the semiconductor along the post to the base, whereby heat from the semiconductor is enabled to escape from the lamp partly through the container and partly through the base.