The ability to see in conditions of dim illumination as if the illumination were actually as bright as daylight.
Characters with low-light vision have eyes that are so sensitive to light that they can see twice as far as a human in starlight, moonlight, torchlight, and similar conditions of shadowy illumination. They retain the ability to distinguish color and detail under these conditions. Thus, if a group of adventurers passes down a dark passage with a torch illuminating a 20-foot radius, an elf with low-light vision can see everything within 40 feet of the torch. A spellcaster with low-light vision can read a scroll as long as even the tiniest candle flame is next to her as a source of light.
Holivian Tales 