The 911 Beacon from Speed of Light Technologies LLC is a 60-watt light bulb with a patented computer chip. The light is placed outside a home or by a window and, when activated by flipping the light switch three times, the bulb flashes brightly – guiding emergency professionals directly to a victim’s doorstep. If the emergency light is not switched off, it will run continuously for three hours before resetting itself. It is rated for 2,000 hours of use. Speed of Light Technologies LLC