The VistOR PRO Emergency Light will deliver up to 2-1/2 hours of continuous operation on a fully charged battery. When adversity strikes in the form of a hurricane or flooding, and takes out the main power, the VistOR PRO will deliver surgical quality lighting to help you through your most demanding cases. Features of the VistOR PRO Emergency Light: 64,500 Lux light intensity from a single quartz halogen bulb Color correct, extremely cool light output Large pre-focused pattern 36-inch depth of field 2-1/2 hours of battery life Large facetted reflector provides shadow free illumination Available as a Ceiling Mount, Wall Mount or Freestanding Mobile Unit