Your Wisdom score increases by 2.
Your Constitution score increases by 1

Physically, they keep the same age as when they died to be born again.
Chronologically & mentally, it depends on their past life, and how they do something of their new one.

Imbued with celestial powers, most white-lighters are good.
Outcasts are most often neutral or even evil.

.You have the same ratio of height-weight as your past life's race.
.You have resistance to either necrotic or radiant damage.
.After become a white-lighter, your DNA will have a triple helix instead of a double.
.Your body is visually identical, but is instead composed of Orbs. Best described as wisps gleaming with vital energy.
If struck by a fatal attack, your body, much like a bee swarm, will disperse into swirls of lights & then reform.
You can however, be knocked unconscious.

You possess several powers, which are used with your Wisdom score for spellcasting ability:
.Healing Touch:
As an Action, thrice per long rest, you can touch a creature and gift it a number of HP equal to your level.

.Light Bringer:
You know the Dancing Light cantrip.

.Thermal Activation: (lvl 4)
You know the Heat Metal spell.

You can speak, read & write Common & Celestial.
You can only hear & speak White-Lighterese, for it is light passing through sounds.

Your base walking speed is 32 ft/10 m.

12-level feature

An accomplished white-lighter/white-lightress gains a pair of luminescent wings:
.Your flying speed is of 39 ft/12 m per 6 seconds.
.Their shine lights up the surroundings, in a 19 ft/6 m wide radius.
.Starting at lvl 13, you use your wings to orb, using the Teleport spell.