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.
Senior Fellow in Electrical Engineering. If the rate being charged for electricity is 10 cents[3] per kilowatt hour, then running the 100-watt bulb for one hour would cost 0.10 kWÂ·h Ã $0.10/kWÂ·h = $0.01, or on â¦ e cent.Running a typical space heater rated at 1500 watts would cost 15 cents per hour (1.5 kW Ã 1 h x $0.10/kWÂ·h = $0.15).enior Fellow in Electrical Engineering. If the rate being charged for electricity is 10 cents[3] per kilowatt hour, then running the 100-watt bulb for one hour would cost 0.10 kWÂ·h Ã $0.10/kWÂ·h = $0.01, or on â¦ e cent.