<p>A surface light source (100) has a body (200) including a first substrate (210, a second substrate (220) facing with the first substrate, and a space-dividing member (230). The first substrate (210) has first fluorescent patterns (215) to convert an invisible ray into a visible ray. The first fluorescent patterns (215) are formed in parallel by a first interval (L1). The space-dividing member (230) is interposed between the first and second substrates to form a discharge space (270). The space-dividing member (230) has a width (W) less than the first interval (L1) to emit the visible ray between the space-dividing member (230) and the first fluorescent patterns (215). A power supply member (300) generates the invisible ray in the discharge space (270). Thus, the surface light source (100) enhances brightness of the visible ray emitted from the body.</p>
