Firefly ZEN Glass Oil Burner Aromatherapy Candle - Oil Lamp burns 48+ hours. Use the Oil Lamp with a Home Fragrance, Essential Oil or Unscented HAND-BLOWN: Single-Piece Glass Oil Burner Aromatherapy Lamp Including Wick, Aluminum Collar and a Small Plastic Funnel for Easy Refilling. The oil lamp uses a 2.6mm wick. Replacement wicks which can be purchased on Amazon http://www.amazon.com/dp/B00PUX3IOC. YOU CONTROL THE SCENT: Ahhh, scent is an element of subjective assessment too strong, not enough, just right, etc. Now, you control how much scent you like by the amount of drops placed on the aromatherapy deck. Start with 4 to 6. Add more if necessary. Please note: If you prefer very strong scents, this may not be the product for you. The Aromatherapy Deck is for Essential Oils (lavender, our favorite) or Home Fragrances plus Provides Wind Protection. COLOR YOUR LAMP OIL: You can also color your oil using Firefly Lamp Oil Dye. The dye pack contains 3 primary colors  red, blue & yellow. Now you can create any color lamp oil you desire - purple, aqua, green, lavender, pink, etc. DIMENSIONS: 2-1/2-inch Diameter by 4-inch Height. Dimensions by 1/16". The fuel capacity is about 8 ounces. We suggest using Firefly paraffin lamp oil or Firefly CLEAN lamp oil. In-house testing shows Firefly CLEAN fuel lasts significantly longer than our paraffin and is less expensive. Firefly Paraffin lamp oil will burn approx. 6 hours per ounce of fuel. Results May Vary. And, the lower the wick above the collar, the longer the burn time. FUEL CAPACITY: About 8 oz. Using Firefly Paraffin Lamp Oil, You will Experience About 48 Hours of Burn Time. The refillable aromatherapy candle makes the perfect unique gift for women, teens and even men. A special, quality gift for under $30 is hard to find and who would not love an eco-friendly refillable candle.