A spark plug is made of a center electrode, an insulator, a metal casing or shell, and a side electrode (also called a ground electrode). The center electrode is a thick metal wire that lies lengthwise within the plug and conducts electricity from the ignition cable hooked to one end of the plug to the electrode gap at the other end.
color of candles It turned out, in the end, pink candles burn the longest, although, it was only off by 0.1 cm. Candles burn faster the first time you light them. Then as you light them again, they burn slower. Blue is in 2nd place, white and gold/yellow are tied for 3rd and green burns the fastest. most scented candles or birthday candles burn out
PILLAR CANDLES. To maximize the burning of pillar candles allow enough burning time for melted wax to reach within 1/4 inch of the edge. Continuous short burning times will cause the candle to tunnel resulting in a drowned wick and wasted wax. If your candle starts to tunnel read this post on how to fix it.