Moon

The moon is a sprite in Middle-earth that appears only at night in the east, and sets in the west. Most Orcs and other evil creatures prefer to fight at night, while men and other good creatures usually wait until sunrise before attacking.

Mechanics
When it turns night and the sun decends below the horizon, the moon will show up, and the light level slowly decreases. If it's 7 or lower will cause evil NPCs to spawn in many biomes. Good NPCs generally spawn regardless of light level.

Differences from Vanilla
While the moon in Middle-earth is very similar to that of Minecraft Vanilla, there are a few important differences:
 * The first (and most obvious) difference is that Middle-earth's moon is round, whereas the Minecraft moon is square.
 * Secondly, it stays in the sky twice as long; a day/night cycle in Middle-earth lasts 40 minutes, where 20 minutes of that is nighttime.
 * Thirdly, each night, the moon phase changes, so it's a new/full moon every eighth day. Middle-earth's time reckoning starts with a full moon.
 * Finally, every 32 nights (every 4th full moon) a lunar eclipe will happen. The moon will turn red and invasions have a greater chance of spawning.