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.
Price. The Powerhorse 3100W/4000W portable generator typically lists for about $450.00 which is in the comparable range for generators in this size range. It has a few extra features and you can benefit from the solid construction.