The main objective of a physical map is to show landforms, bodies of water and other geographical features. Features shown include mountains, deserts and lowlands as well as lakes, rivers and oceans.
Depending on your electricity prices, a 400 watt HID will cost $200 â $400 each year of use, plus the cost of replacement bulbs. LEDs meant to replace 400w HIDs average around 180 watts.
A simple equation to work out how much running an appliance costs you: Wattage x hours used per day / 1000 = daily kilowatt usage. (1 kilowatt hour = 1,000 watts). As an example, our kettle takes 2,200 watts to run. Assuming that I boiled it (full) for a total of 1/2 hour per day it would use 1.1 kilowatts per day.To work out the cost, multiply the kilowatts per day by the cost per kilowatt hour as per your electricity bill. According to our latest electricity bill, our electricity costs $0.17130 per kilowatt hour.So at 1/2 hour per day, it costs us 19c each day to boil the kettle.ccording to our electricity bill we pay $0.17130 per kilowatt hour, so this appliance would cost us $86 per year or $0.23 per day to run. Apart from the energy rating sticker, most appliances have their wattage printed somewhere on them so you can work out how much they cost to run.