A thermally insulated door assembly (100; 500) comprising: an outer first pane (400; 502) of light transmissive material having an outwardly facing surface and an opposite inwardly facing surface; a second pane (402; 504) of light transmissive material having an outwardly facing surface and an opposite inwardly facing surface, the outwardly facing surface of the second pane (402; 504) facing the inwardly facing surface of the first pane (400; 502), the first pane (400; 502) and the second pane (402; 504) spaced apart from each other by a separation gap to define an interior chamber; a spacer body sealed to the inwardly facing surface of the outer first pane (400; 502) and to the outwardly facing surface of the second pane (402; 504); a light assembly disposed within the interior chamber between the first pane (400; 502) and the second pane (402; 504), the light assembly configured to generate light within the interior chamber; and a heat sink disposed within the interior chamber and coupled with the light assembly and the inwardly facing surface of the first pane (400; 502), wherein the heat sink is configured to conduct thermal energy generated by the light assembly onto the inwardly facing surface of the first pane (400; 502) and into the interior chamber such that the inwardly facing surface of the first pane (400; 502) and the interior chamber are heated by the light assembly; wherein the heat sink includes a lateral elongated portion connected with a transverse elongated portion, wherein the lateral elongated portion of the heat sink is coupled with the inwardly facing surface of the outer first pane (400; 502), the lateral elongated portion of the heat sink is elongated in a direction that extends along the inwardly facing surface of the outer first pane (400; 502), the transverse elongated portion of the heat sink is extending from the inwardly facing surface of the outer first pane (400; 502) and engaging the outwardly facing surface of the second pane (402; 504) characterized by a smaller interior portion of the interior chamber that is bounded by the spacer body, the transverse elongated portion of the heat sink, the outwardly facing surface of the second pane (402; 504), and the inwardly facing surface of the outer first pane (400; 502), wherein the light assembly is disposed within the smaller interior portion of the interior chamber between the spacer body and the transverse elongated portion of the heat sink and between the outwardly facing surface of the second pane (402; 504) and the inwardly facing surface of the outer first pane (400; 502). an outer first pane (400; 502) of light transmissive material having an outwardly facing surface and an opposite inwardly facing surface; a second pane (402; 504) of light transmissive material having an outwardly facing surface and an opposite inwardly facing surface, the outwardly facing surface of the second pane (402; 504) facing the inwardly facing surface of the first pane (400; 502), the first pane (400; 502) and the second pane (402; 504) spaced apart from each other by a separation gap to define an interior chamber; a spacer body sealed to the inwardly facing surface of the outer first pane (400; 502) and to the outwardly facing surface of the second pane (402; 504); a light assembly disposed within the interior chamber between the first pane (400; 502) and the second pane (402; 504), the light assembly configured to generate light within the interior chamber; and a heat sink disposed within the interior chamber and coupled with the light assembly and the inwardly facing surface of the first pane (400; 502), wherein the heat sink is configured to conduct thermal energy generated by the light assembly onto the inwardly facing surface of the first pane (400; 502) and into the interior chamber such that the inwardly facing surface of the first pane (400; 502) and the interior chamber are heated by the light assembly; wherein the heat sink includes a lateral elongated portion connected with a transverse elongated portion, wherein the lateral elongated portion of the heat sink is coupled with the inwardly facing surface of the outer first pane (400; 502), the lateral elongated portion of the heat sink is elongated in a direction that extends along the inwardly facing surface of the outer first pane (400; 502), the transverse elongated portion of the heat sink is extending from the inwardly facing surface of the outer first pane (400; 502) and engaging the outwardly facing surface of the second pane (402; 504) characterized by a smaller interior portion of the interior chamber that is bounded by the spacer body, the transverse elongated portion of the heat sink, the outwardly facing surface of the second pane (402; 504), and the inwardly facing surface of the outer first pane (400; 502), wherein the light assembly is disposed within the smaller interior portion of the interior chamber between the spacer body and the transverse elongated portion of the heat sink and between the outwardly facing surface of the second pane (402; 504) and the inwardly facing surface of the outer first pane (400; 502).