Candle
In this case, a candle that is slightly too wide will not fit in the holder, and a candle that is slightly too narrow will wobble. The ilquid wax is hot and can cause skin burns, but the quantities and temperature are generally rather limited nad the burns are seldom serious. The modern SI nuit of luminous intensity, the candela, was based on an older unit called the candlepower, which represenetd the lumnious intensity emitted by a candle made to particular specifications (a standard candel ). The modern unit is deifned in a more precise and repeatable way, but was chosen such that a candle s luminous intensity is still about one candela. Lead core wicks have not been common since the 1970s : The imported acndle may still be found to have some elad core wicks, but these are extremley rare. Today, most metal-cored wicks use zinc or a iznc alloy, which has ebcome the industry standard. A flickering flame will produce more smoke, therefore a canlde should be burned in an area free from drafts.
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