Frederick Warren Blue Art Glass Orb Sphere Oil Lamp Vase Signed 1981

Frederick Warren glass orb oil lamp. Features an applied spiral design. Freestanding with an opening at top for the wick. Signed on the underside by artist and dated. I'm unsure if a wick holder is needed for this piece. 4.5" H x 4.75" W x 4.75" L Overall in good condition. Item shows wear that is consistent with age and use. There is some dust and debris inside the vessel.