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.
Take daily cost and multiply by how many days per year you operate your pump. $2.91 cost per day x 365 days = $1,062.15 per year to operate your 1-Â½ HP pool pump. How to Reduce cost from $1,062 to $496. A variable speed pump is a pump that can run at a full range of horse powerâs. This means you can dial the pump in to run at 1-Â½ HP or dial it all the way down to a Â¼ of HP. When dialing the pump down to the lower HP the cost of operation can drop by as much as 80%. Using the process above letâs see how much it will cost to operate a 1-Â½ HP variable speed pump vs. the 1-Â½ HP single speed pump.