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Warm Color
Generally, a color that is in the yellow-orange-red range.

Warm Light
Light having a color temperature of approximately 2600°K - 3400°K, i.e. yellow-white to red-white.

Wash
An even overall illumination over a large area.

Wash Light
A luminaire used to produce a wash

Watt (W)
A unit of measurement for heat or Electrical Power.

Wavelength
The distance, measured in the direction of propagation, of a repetitive electromagnetic wave between two successive points.