How do I identify a converted oil lamp?

Converted oil lamps typically retain original brass burners, collars, or reservoirs that have been adapted to accept modern electrical fittings. Examine the upper portion of the base where the burner assembly joins the ceramic, glass, or metal body to spot threaded components originally designed for liquid fuel.

What is the difference between porcelain and earthenware lamps?

Porcelain is fired at extremely high temperatures to produce a vitreous, non-porous body that often rings when struck and appears translucent in thin sections. Earthenware, such as Majolica or Satsuma, uses lower firing temperatures and results in an opaque, heavier ceramic body. Surface decoration behaves differently on each substrate, with porcelain accepting smooth overglaze enamels and earthenware often showing a characteristic glaze crazing.

How should I clean a painted lamp surface?

Dust painted and lacquered surfaces gently with a dry, soft microfiber cloth to prevent abrasion of delicate pigments and gilt highlights. Avoid chemical cleaners, moisture, and solvents, which can lift water-soluble paints or damage historic lacquer finishes.

Are these lamps professionally rewired?

Many antique lighting pieces require updated internal wiring to meet contemporary electrical safety standards for domestic use. Listings indicate whether a piece has been recently rewired or retains older components requiring professional inspection.