See screenshots for specifics.
Light level is reported as 0 (zero), but two torches are near by.
Moving slightly in either direction gets a different (correct?) light level reported.
The world is too large to upload.
Environment
Windows 7, 64 bit, vanilla minecraft 1.8.8, no mods, no texture packs.
Light level 0 seems to be reported when standing on cobble stone stairs.
Standing on other blocks appears to report the correct light level.