Conjure Celestial Redux

You summon the protective presence of a Celestial spirit, which manifests as a pillar of divine light that shines in a 10-foot-radius, 40- foot-high cylinder centred on a point within range. Until the spell ends, bright light fills the cylinder, and when you move on your turn, you can also move the cylinder up to 30 feet.

When a creature enters the cylinder for the first time on a turn or starts its turn there, you can bathe that creature in one of the following lights:

• Healing Light. The creature that isn't an Undead or a Construct regains hit points equal to 6d12 plus your spellcasting modifier. A creature can be healed by this light only once per casting of this spell.
• Searing Radiance. The creature must make a Dexterity saving throw, taking 6d12 Radiant damage on a failed save or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of level 8 or higher, the healing and damage increase by 1d12 for each slot level above 7th.