diff --git a/mclevel.py b/mclevel.py
index f7cd213..552775d 100644
--- a/mclevel.py
+++ b/mclevel.py
@@ -1269,6 +1269,7 @@ class InfdevChunk(MCLevel):
         
         levelTag[BlockLight] = TAG_Byte_Array()
         levelTag[BlockLight].value = zeros(16*16*64, uint8)
+        levelTag[BlockLight].value[:] = 255
         
         levelTag[Blocks] = TAG_Byte_Array()
         levelTag[Blocks].value = zeros(16*16*128, uint8)
@@ -1278,6 +1279,7 @@ class InfdevChunk(MCLevel):
 
         levelTag[SkyLight] = TAG_Byte_Array()
         levelTag[SkyLight].value = zeros(16*16*64, uint8)
+        levelTag[SkyLight].value[:] = 255
 
         levelTag[HeightMap] = TAG_Byte_Array()
         levelTag[HeightMap].value = zeros(16*16, uint8)