The kind of lighting you choose will be a huge factor in the cost of lighting installation. Simple lighting can be pretty affordable, but more expensive fixtures will bring up the cost of installation-as will antique chandeliers or fixtures.
a change in supply is the shift in supply curve due to change in price of other commodities and other factors like taste,weather,income e.t.c while a change in quantity supply â¦ is the change in price of the commodity itself that affect the quantity supply,here the supply curve remain constant but there will be a movement along the supply curve.
Demand is the relationship between Prices and Quantities Demanded. Changes in things other than the price of the good or service may lead to changes the demand. After the jam band Phish performed their last gig, the sales of soap and shampoo increased. (paraphrased from a late night comedian). So to an economist, demand is not the same as the quantity demanded.