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.
Report Abuse. If you are using 40 watts it will take 25 hours to use 1KWH. Electric rates vary from 6 cents per KWH to over 12 cents per KWH. If your utility company charges 10 cents per KWH then it would cost you 10 cents for running 25 hours.KILOWATT Â· 7 years ago.Thumbs up.eport Abuse. If you are using 40 watts it will take 25 hours to use 1KWH. Electric rates vary from 6 cents per KWH to over 12 cents per KWH. If your utility company charges 10 cents per KWH then it would cost you 10 cents for running 25 hours. KILOWATT Â· 7 years ago.