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Jen Burn Friday, 19 July 2013 09:32 TWEET COMMENTS 0

Nighttime Illumination - Page 9

GLOSSARY

Lumen

A unit of standard measurement describing how much light is emitted.

LED

Light-emitting Diode, a semiconductor diode that glows when a voltage is applied; LEDs produce brighter light than other types of bulbs while using less energy.

Lithium-ion

A type of a rechargeable battery that offers significant weight savings over its re- chargeable cousins (NiCad and NimH) and maintains its charge during extended disuse; however, it fares less well in extreme temperatures.

 



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