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I forgot to mention.

Like other high-melting solids, such as tungsten and carbon, Calcium Oxide
(Lime) becomes incandescent when heated near its melting point of 2,500
degrees C.

Before the advent of electricity (circa 1880), Lime was used as an
illuminant in stage lighting.  The technique, invented in 1816 involved
impinging a hot oxyhydrogen flame on a cylinder containing a solid block of
Lime.  When heated sufficiently, the lime would emit a brilliant white
light that was concentrated to a beam by a lens, and was used to spotlight
actors on stage.

That's where we get the phrase "In the Limelight..."

True story.

Kevin "Mr. Lime"
HeyyDude

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