MinecraftForge/MinecraftForge — pull request #167 by monoxide0184 (2012-09-13 12:32:05+00:00)
Title: Add hooks to modify light levels

Related to #97 by @tambry. Not sure if this is everything the original poster wanted as his patch was very hard to read, but this is sufficient for my needs. Suggestions on expansions on this if other people need even more control are welcome.