Arclight Lyrics

Lyric discussion by ThePsychoticWolf 

Cover art for Arclight lyrics by Deathstars

arc light is the general term for a class of lamps that produce light by an electric arc (also called a voltaic arc). The lamp consists of two electrodes, typically made of tungsten, which are separated by a gas. The type of lamp is often named by the gas contained in the bulb; including neon, argon, xenon, krypton, sodium, metal halide, and mercury. The common fluorescent lamp is actually a low-pressure mercury arc lamp.

Yes I did copy and paste that from Wikipedia :P

As for the rest of the song, I think it is about not being able to forgive a hurtful event Whiplasher has dealt with.