1)
What is the meaning of "v'Hotzi cha'Or Tzidkecha"?
1.
Radak: He will reveal your virtue to the world, just like light is always revealed.
2.
Malbim: Evildoers need to do all their deeds in darkness, for they would be ashamed of their deeds (if they were known). Hashem will reveal your virtue!
2)
Why does it say "u'Mishpatecha ka'Tzaharayim"?
1.
Radak: Just like light is strong in the afternoon, so the entire world will recognize that all Your ways are with Tzedek and Mishpat.
2.
Malbim: Evildoers fear judges, lest they judge them. One who trusts, Hashem brings out his judgment like afternoon.
