Some manufacturers claim that their LEDs can last up to 570 years. However, most LEDs can be expected to last between 80 to 100 years. Since incandescents last only 3,000 hours, this LED light source can last 292 times longer. Furthermore, Incandescents need to be replaced about every four months while compact fluorescents will need replacement in just over a year. This means that retrofitting to an LED unit will substantially reduce your need for a steady flow of replacement lamps.
Most manufacturers arrange LEDs in a dot formation along the letters of the sign.
These dots reflect out, unseen from outside the fixture. Newer designs position the LEDs in a row formation on each side of the fixture's interior. This produces brighter, more even illumination of the sign. All LEDs are guaranteed to maintain quality illumination throughout their long rated life. A Trend Toward Efficient Exit Sign Lighting Facility managers can now select from retrofit or complete exit sign options to meet the lighting regulations of fire, building, and occupational safety codes.