Elliptical Son-E lamps feature a diffuse surface and are available in versions with integrated ballast. The Lucalox versions include an amalgam container that helps to slow down voltage rises in the lamp, which is a common cause of failure. Shatterproof Son-E versions are suitable for food preparation areas and are FDA approved. Son-E Twin Arc versions offer a significantly longer life and allow re-ignition in hot conditions after a power failure.