Blessed are those who have learned to acclaim you, who walk in the light of your presence, LORD. (NIV)
Blessed (happy, fortunate, to be envied) are the people who know the joyful sound [who understand and appreciate the spiritual blessings symbolized by the feasts]; they walk, O Lord, in the light and favor of Your countenance! (AMP)
Blessed is the people that know the joyful sound: they shall walk, O LORD, in the light of thy countenance. (KJV)