If you haven&#x27;t seen mercury vapors under an ultraviolet light, it&#x27;s quite dramatic: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=JABbofwD3MI" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=JABbofwD3MI</a>