Shining Smite
The target hit by the strike takes an extra 2d6 Radiant damage from the attack. Until the spell ends, the target sheds Bright Light in a 5-foot radius, attack rolls against it have Advantage, and it can't benefit from the Invisible condition.
Using a Higher-Level Spell Slot. The damage increases by 1d6 for each spell slot level above 2.
Shining Smite 5e 2024 vs. 2014 edition differences
The 2014 version deals extra radiant damage on hit, makes the target shed dim light, and prevents invisibility. The 2024 version deals the same damage, causes the target to shed bright light, grants advantage on attack rolls against it, and explicitly states it can't benefit from invisibility. Damage increase wording differs slightly.