Talk:Day of Black Sun/@comment-75.102.211.10-20120303021308/@comment-3338975-20120314180209

The idea is probably that during a solar eclispe, the Moon Spirit's influence overrides that of the Sun's, so that they're not able to Firebend. The reverse would be true during a (normal) lunar eclipse. Since neither's influence is counteracted by that of its opposite during the exceptions mentioned, Firebenders don't loose all power underground, or at night, nor Waterbenders during the day. Still, theoretically, a Firebender's power ought to be weaker at night, though not eliminated altogether.