You are definitely trying to conserve money, but you can save more in the end if you replace them. You can expect that your bills will go down as the new models don't consume plenty of energy.
You need to also know how to correctly your appliances if you would like to preserve money on electricity. Your monthly bills are generally focused on your appliances. The best way that you can think about is to substitute your old home appliances and start buying new designs. The new models are made so they can consume less energy and provide the same efficiency. It is a fact that you will have to invest lots of money on new designs, but this is a great move in the long run.
If you preserve energy, you can also preserve more money in your monthly bills and you can handle your finances well. You can conserve more money in the future in case you are not paying large monthly bills. You can anticipate that these suggestions will help you.
You can also try the simplest way to do it. Try using all-natural light in daytime and your artificial lighting at night. During daytime, let all-natural light enter your house to illuminate it and artificial lighting at night.