The Phial of Galadriel

This Lite weighs 1.0 lbs. You can wield this as a source of light. It provides resistance to disease. It is not damaged by acid, electricity, fire, cold and water. It cannot be stolen from your inventory. When activated, it lights up the room you are in, and surrounds you with magic of radius 2 to light up for 25 damage to monsters vulnerable to light, recharging in d10+10 turns. When thrown, it does 1d1 blunt damage and lights up one target for 25 damage to monsters vulnerable to light, recharging in d10+10 turns. When set in a trap, it lights up one target for 25 damage to monsters vulnerable to light, recharging in d10+10 turns.
Level 25, Rarity 5, 1.0 lbs, 10000 AU

(UnAngband 0.6.2)