By replacing and adding home energy saving devices will not only help you the efficient and effective energy use but also cut down cost of electricity usage considerably. Home energy saving devices are important in tow ways, fist is that it helps you to save the dollars by cutting down your electricity cost. There are special types of solar energy bulb available in market. They bulbs have special darkness sensors in it which sense the darkness and turn on automatically. You have no need to turn on these solar energy bulbs manually. If there is a light then these bulbs are turn off automatically. The use of solar energy bulb is very easy. Alternative energy sources are usually called as free energy because it continually produced via earth's natural processes. A conversion device or some kind of mechanism is required to utilize this free energy. Now-a-days, numerous alternative energy devices are available in the market. You can bring into play any one of your choice and suitability in order to make your house an energy efficient place. Also, turn the lights off before leaving the room even for few minutes. Thermostat of the refrigerator should be reduced as it utilizes about 20% of the total household electric use. You can save about 90% of power consumption by washing the clothes with cold water instead of hot water. Germs on the clothes are eradicated through detergents rather than hot water. Otherwise you can hire an 'external auditor' that has been trained for such purpose and are well-equipped for the assessment. They have the blower doors and infrared cameras to assess the loss of cooling and heat from a house. Any hidden holes and cracks are detected. These auditors check the walls, ceilings, doors and every other prospect that can contribute to energy conservation. All rooms have standardized temperature unlike the uneven temperatures in ordinary houses. Discuss these issues with your contractor and architect, ensure that your house is properly ventilated and is made up of bricks that contain high amount of thermal mass. Bricks rebound heat to the eternal environment and absorb the remaining, keeping the house safe from becoming too hot or too cold.