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Desk Lamp
The desk lamp was developed to illuminate a work surface. Desk lamps are typically designed with down-pointing shades held on height and pivot-adjustable arms. The bases are typically stout to support the cantilevered weight of the shade. The light is focused on the work or reading surface; the lip of the shade is below eye-level.
Diaper Pattern
A cross-hatched, low-relief surface decoration pattern.
Diffuser
Light control device that spreads light by scattering it. Glass, fabric, and paper shades act as diffusers.
Directoire
A period of design in France after the Revolution, from 1793 to 1800. Characterized by Roman motifs and named for the Directory, the new revolutionary French government.
Dome
A partial or full-hemisphere for diffusing or reflecting light. See also “Bowl” and “Inverted Dome Chandelier”.