Working Drawing(s) is a drawing sufficiently complete with plan and section views, dimensions, details, and notes, so that whatever is shown can be constructed and/or replicated without instructions but subject to clarifications, see drawings.
Wet Niche Luminaire lighting fixture is a luminaire lighting fixture intended for installation in a forming shell mounted in a pool.
Weatherproof is constructed or protected so that exposure to the weather will not interfere with successful operation.
Watt is a measure of power. A watt is the power required to do work at the rate of 1 joule per second. Wattage is determined by multiplying voltage times the power factor of the circuit: W = E x I x PF.
Watertight is constructed so that moisture will not enter the enclosure under specified test conditions.