Innovation, evolution, revolution, disruption... How many of today's most popular TED Talks, best sellers, even Netflix specials, include these words in the title or description? Our days overflow with statistics about "the next big job" and "the new face of American unemployment," and our evenings are consumed by an endless queue of post-apocalyptic fiction—it's no surprise we're left tossing and turning come bedtime. With lighting changing as much as any industry, we asked a group of professionals one simple question: What keeps you up at night? Their responses touch on everything from dark-sky preservation to cyber security.
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