Patent ID: 8733039

Claim:
A thermally insulating skylight ( 1 ), the skylight comprising: a light tube defining a pathway for passing light from the outside of a structure through a roof to the inside of the structure, the light tube comprising: an input part ( 1 ) having a light collector ( 11 ) for collecting outdoor light and also an upper tube ( 12 ); a roof passage part ( 2 ); and a lower tube ( 3 ) leading to a diffuser ( 31 ); wherein the roof passage part is positioned between the upper tube and the lower tube, the roof passage part ( 2 ) being for passing light received from the input part ( 1 ) through a roof; wherein the roof passage part comprises an insulation double glazing unit ( 21 ), the insulation double glazing unit being a thermally insulating physical barrier positioned between the input part ( 1 ) and the lower tube ( 3 ), the insulation double glazing unit ( 21 ) comprising light permeable material for allowing passage of light there through; and the roof passage part further comprising a collar ( 22 ), the collar ( 22 ) comprising foam insulation material and surrounding the insulation double glazing unit ( 21 ), the insulation double glazing unit being fixed in the collar by an anchoring holder ( 23 ), the collar being for positioning within a roof.