Bukkit/Bukkit — pull request #428 by mikeprimm (2011-11-26 02:38:32+00:00)
Title: Add Block API for getting sky light and emitted light levels 

These allow access to the lower-level lighting data, which can be used for both light color sensitivity (redder emitted light vs bluer sky light), as well as other light-type-sensitive functions (sky light level approximates visibility of the location from above, predicting light levels after dark or during storms, etc).

(Accidentally closed first request - see https://github.com/Bukkit/Bukkit/pull/390 for previous discussion)

Corresponding pull in Craftbukkit - https://github.com/Bukkit/CraftBukkit/pull/515