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.
The average PV system installed is 6,600 watts (6.6 kW) and costs $31,700 for a cost per watt of $4.80. The expected lifetime cost per kilowatt hour (kWh) is $0.17. In comparison, the average 6,600 watt PV system from FreeCleanSolar costs $19,800 for a cost per watt of $3.