Candle Safety

Candle Fire Safety Rules from the National Candle Association

• Always keep a burning candle within sight. Extinguish all candles when leaving a room or before going to sleep. Be sure the wick ember is no longer glowing
• Never burn a candle on or near anything that can catch fire. Keep burning candles away from furniture, drapes, bedding, carpets, books, paper, flammable decorations, etc.
• Keep burning candles out of the reach of children and pets.
• Trim candlewicks to ¼ inch each time before burning. Long or crooked wicks can cause uneven burning and dripping.
• Always use a candleholder specifically designed for candle use. The holder should be heat resistant, sturdy, and large enough to contain any drips or melted wax.
• Be sure the candleholder is placed on a stable, heat-resistant surface. This can help prevent heat damage to underlying surfaces and prevent glass containers from breaking.
• Keep the wax pool free of wick trimmings, matches and debris at all times.
• Always read and follow the manufacturer's use and safety instructions carefully. Don't burn a candle longer than the manufacturer recommends.
• Keep burning candles away from drafts, vents, ceiling fans and air currents. This will help prevent rapid, uneven burning, and avoid flame flare-ups and sooting. Drafts can also blow nearby lightweight items into the flame where they could catch fire.
• Always burn candles in a well-ventilated room. Don't burn too many candles in a small room or in a "tight" home where air exchange is limited.
• Don't burn a candle all the way down. Extinguish the flame if it comes too close to the holder or container. For a margin of safety, discontinue burning a candle when 2 inches of wax remains or ½ inch if in a container.
• Never touch or move a burning candle or container candle when the wax is liquid.
• Never use a knife or sharp object to remove wax drippings from a glass holder. It might scratch, weaken, or cause the glass to break upon subsequent use.
• Place burning candles at least three inches apart from one another. This helps ensure they don't melt one another, or create their own drafts to cause improper burning. 
• Use a snuffer to extinguish a candle. It's the safest way to prevent hot wax splatters.
• Never extinguish candles with water. The water can cause the hot wax to splatter and might cause a glass container to break.
• Be very careful if using candles during a power outage. Flashlights and other battery-powered lights are safer sources of light during a power failure.
• Extinguish a candle if it repeatedly smokes, flickers, or the flame becomes too high. The candle isn't burning properly. Cool, trim the wick, then check for drafts before relighting.
• Never use a candle as a night light.

Source: http://candles.org/wp-content/uploads/2014/05/Candle-Fire-Safety-Rules.pdf