Dark Lantern

Designed by shadowcasters, a dark lantern sheds a mystical light in the form of shadowy illumination. This item is a hooded lantern, constructed of black iron with mithral filigree. Its crystalline panels are tinted bright gold. When lit, the lantern radiates shadowy illumination out to 60 feet. The light flickers more slowly than normal fire, and the crackle of the flames sounds more like plodding footsteps. You strike a light within, just as if it were a normal lantern. The lantern must have oil or other fuel. You also speak a command word, such as "shadows" or "darkness". The activating process requires a full-round action. You can deactivate the lantern by opening it and blowing out the flame within (altogether a standard action).
A dark lantern sheds a mystic light that creates shadowy illumination, modifying the brightness of ambient light as well as spells of equal or lower level with the light or darkness descriptor.
Moderate evocation. CL 9th. Craft Wondrous Item, dusk and dawn, 1,000 gp, 80 XP, 2 days. Weight: 2 lb. Price: 2,000 gp.
Source: Tome of Magic