| Lights and Lightbulbs | ||
| There are only four shortcomings of fluroescent lighting; /1/ the light (wavelengths) /2/ the noise of the ballast (baluns); | ||
| /3/ frequent flickeringand /4/ toxic mercury gas is released in small amounts if the bulb breaks after being accidentally | ||
| touched by a spear, Kwan dao or other weapon. After quickly evacuating the class cleaning up the debris is not fun. | ||
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