Abstract: A structure for extracting light, which improves light extraction efficiency by enhancing a scattering effect and improves power efficiency and thus increases the lifetime of an organic electroluminescent lighting device, is provided, and an organic electroluminescent lighting device including the structure for extracting light is also provided.

Abstract: Provided is a light therapy device capable of further maximizing a scattering effect, having enhanced durability, and exhibiting energy uniformity sufficient for use as a light therapy device.

Abstract: The present application relates to a both-side light-emitting lighting device, which maximizes a scattering effect so as to be capable of increasing light extraction efficiency, and may acquire high power efficiency as a both-side light-emitting lighting device so as to be capable of increasing the lifespan of the lighting device, and includes: a first light-outputting surface; a second light-outputting surface positioned to face the first light-outputting surface; a light-emitting device positioned between the first light-outputting surface and the second light-outputting surface; and a light extraction film including a base material, which is positioned on the first light-outputting surface, has first and second surfaces facing each other, and is provided such that light enters through the first surface and exits through the second surface, and a plurality of pores irregularly distributed in the base material, wherein the base material allows the light to be scattered when the light transmits therethrough,