Game runs but a whole lot of errors

[luther's caption]

This is part of hpl.log :

Game Running
--------------------------------------------------------
-------- Loading map 'menu_bg.map' ---------
Cache Loading: 4145 ms
Entities: 1396 ms
Compilation: 1 ms
Total: 5674 ms
Meshes created: 25
Bodies created: 5
-------- Loading complete ---------
Setting profile: 'Boldar' Path: 'C:\Documents and Settings\John\My Documents/Amnesia/Main/Boldar/'
Saving main config.
Saving user config.
-------- Loading map '00_rainy_hall.map' ---------
Cache Loading: 9200 ms
Entities: 11519 ms
Compilation: 40 ms
Total: 21375 ms
Meshes created: 147
Bodies created: 48
-------- Loading complete ---------
ERROR: Could not find light 'spotthunder_0'
ERROR: Could not find light 'pointthunder_0'
ERROR: Could not find light 'ambthunder_0'
ERROR: Could not find light 'spotthunder_0'
ERROR: Could not find light 'pointthunder_0'
ERROR: Could not find light 'ambthunder_0'
ERROR: Could not find light 'spotthunder_0'
ERROR: Could not find light 'pointthunder_0'
ERROR: Could not find light 'ambthunder_0'
ERROR: Could not find light 'spotthunder_0'
ERROR: Could not find light 'pointthunder_0'
ERROR: Could not find light 'ambthunder_0'

These errors go on for a while, but like I said the game runs.
Should I be concerned about this?