How to Make Color-Changing Candles

Gather your candle jar, light-emitting diode (LED) and hot glue gun. Coloring-changing LEDs come with a wick attached to them, and this is what you want to attach to the center of your jar. Carefully attach the LED wick as close to the center of the jar as you can get with your hot glue gun. Slide it over the wick with a straw and press down firmly until the glue is dry.

Weigh out the amount of wax you need for your candle. This is usually 1 ounce less than the jar you're using. For example, if your candle jar is 8 ounces, you should use 7 ounces of wax.

Heat the wax in a double boiler to 180 degrees Fahrenheit. Once the wax is completely melted, add any desired fragrance and stir. The amount of fragrance you add depends on how strongly you want your candle to smell, but 1 ounce per pound of wax is considered average.

Cool down the wax to 150 degrees Fahrenheit.

Pour the melted wax into the candle jars slowly, keeping the straw in place. This will ensure that the wick stands up straight and doesn't get lost in the wax.

Remove the straw from the wick after you've poured the wax, but before it has time to set. Make sure that the wick is still in the center of the jar.

Place the candle somewhere to cool. This process can take several hours depending on the size of your candle jar and works best if left to cool overnight.

Trim the wick of your candle to the desired length. This should be no more than 1/2 inch to prevent the flame from jumping and starting a fire.

Light your candle. Coloring-changing LED wicks require no extra care, no batteries and no switch. Simply light your candle and watch the colors change.