Here is a great Dark Knight Returns Joker from Mid Ohio Comic Con a few years back. It’s refreshing to see a different take on the Clown Prince of Crown other than the various Ledger style Jokers that seem to be at every comic convention.
Neon lights glow through the science of excited atoms. When electricity passes through a sealed tube of neon gas, electrons jump to higher energy levels. As they return, they release energy as vibrant light, creating dazzling displays in cities worldwide.
The Evil Hoard 
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