Sunlight spells deal half damage to non-undead targets. They also bypass magic resistance.
Sunlight weapons, new weapon type.
Similar to bound weapons where you summon it via a spell.
Deals double damage to undead.
They are essentially 1 damage weapons that deal sunlight damage on hit. Thus, perks that increase damage or armor penetration will have no effect. Unlike sunlight spells, this damage is reduced by magic resistance.
Perks in Restoration will improve their damage and give them the ability to increase regeneration of an attribute or movement speed on hit.
Slower weapons have a stronger effect per hit (both for damage and secondary effects).