1.   And during peak demand, discounts can vanish.

2.   Electricity companies use it to switch off certain loads, such as water heaters, at times of peak demand.

3.   It can protect your equipment from hazardous brownouts that occur when electric companies reduce voltage during periods of peak demand.

4.   The demand for electricity is uneven throughout the day, involving certain periods of peak demand.

5.   To save the most money, consumers would have to change their habits to shift the times of peak demand.

6.   Then at peak hours the water can be allowed to run out through hydro-electric turbines to contribute to meeting that peak demand.

7.   Also, stockpiles are falling as the industry enters its period of peak demand in the months leading up to Christmas.

8.   And by reducing the peak demand, it takes a few buyers out of the market and makes the price lower for the remaining buyers.

9.   And its large residential base requires an unusually big capacity to meet peak air-conditioning demand.

10.   Atlanta-based Delta Air Lines was praised for a schedule restructuring at Hartsfield International Airport that reduced congestion at times of peak demand.