diff --git a/overviewer_core/world.py b/overviewer_core/world.py
index 9f91efc..d7d1699 100644
--- a/overviewer_core/world.py
+++ b/overviewer_core/world.py
@@ -1307,8 +1307,10 @@ class RegionSet(object):
         # Empty is self-explanatory, and liquid_carved and carved seem to correspond
         # to SkyLight not being calculated, which results in mostly-black chunks,
         # so we'll just pretend they aren't there.
-        if chunk_data.get("Status", "") in ("empty", "carved", "liquid_carved", "decorated"):
+        if chunk_data.get("Status", "") != "full":
             raise ChunkDoesntExist("Chunk %s,%s doesn't exist" % (x,z))
+        if not chunk_data.get("isLightOn", 0):
+            raise ChunkDoesntExist("Chunk %s,%s isn't lit" % (x,z))
 
         # Turn the Biomes array into a 16x16 numpy arra
         if 'Biomes' in chunk_data and len(chunk_data['Biomes']) > 0: