The measure of the efficiency of fluorescent lamp ballasts. It is the relative light output divided by the power input.
Ballast factor
The ratio of light output of a fluorescent lamp operated on a ballast to the light output of a lamp operated on a standard or reference ballast.
Ballast transformer
Transformer that supplies voltage to the light tubes in a fluorescent light to provide a high starting voltage and then limiting the current.
Ballcock
The fill valve that controls the flow of water from the water supply line into a gravity-operated toilet tank. It is controlled by a float mechanism that floats in the tank water. When the toilet is flushed, the float drops and opens the ballcock, releasing water into the tank and/or bowl. As the water in the tank is restored, the float rises and shuts off the ballcock when the tank is full.
Balled and burlap
A method in which plants are sold where the roots of a plant have been lifted and wrapped in burlap to keep it together until transplanted.
Balloon bag
Device that attaches to a garden hose & used to loosen a blockage in a clogged drain.
Balloon frame construction
Type of framing used in two-story homes where one-piece studs extend from the foundation to the roof and form the walls of both stories.
Balloon framing
The building-frame construction in which each of the studs is one piece from the foundation to the roof of a two-story house.
Balloon loan
A mortgage in which the monthly payment is not intended to repay the entire loan. The final payment is a large lump sum of the remaining principal.
Balloon mortgage
A mortgage with periodic installments of principal and interest that do not fully amortize the loan. The balance of the mortgage is due in a lump sum at a specified date, usually at the end of the term.
