Emergency Lighting and Exit Signs: Helping People Find the Way Out When power fails, confusion can spread quickly. Darkness makes even familiar spaces feel unsafe — and in an emergency, hesitation can be dangerous. That’s why emergency lighting and exit signs exist: to guide people calmly and safely out of a building when it matters most Power Outages Can Happen Suddenly Power failures don’t always come with warning. They can be caused by: Electrical faults Equipment failure