Lemon Essential Oil is among the most popular essential oils, known for it's clean and vibrant aroma. As an aromatherapy essential oil for diffusers, Lemon Essential Oil helps uplift and energize your mood, while also providing a boost to the immune system. Other Lemon Essential Oil uses: Add 2-3 drops to your laundry to give it a natural lemony-clean aroma. Add 20 drops of Lemon Essential Oil and 10 drops of Tea Tree Oil to an 8 oz spray bottle, and use as a natural household disinfectant. Add 5-10 drops to an essential oil diffuser to help alleviate headaches and fevers.