Peak Beam Intensity Reported in lux or candelas (1 lux is approximately equal to the light from one candle measured at a point 1 meter from the candle, 1 lux = 1 candela but only when measured at 1 meter).
Measured with a lux meter.

Net Light Output Reported in lumens. (1 lumen = 1 candela * 1 square meter).
Total projected light output, taking into account inefficiencies in lens, reflector, and casing, measured at a specified time after the light is switched on, to account for “sag” in the batteries.
Must use the same new and unused batteries as packed with the light.
Measured in an integrating sphere to capture light radiated at all angles
As you can see from the above, while lux and lumens are related, there is not a direct conversion from one to the other. An analogy for this would be the height and volume of a container – even though there is a relationship between height and volume, there is not a direct conversion between the two.
Beam Distance is defined as the distance from the device at which the light beam is 0.25 lux (0.25 lux is approximately the equivalent of the light emitted from the full moon “on a clear night in an open field”).


Runtime Reported in hours and/or minutes.
The continuous time lapsed from the initial light output to when the light output is at 10% of the initial light output.
Must use the same new and unused batteries as packed with the light.
Measured in an integrating sphere or with a lux meter.

Protection Against Water Penetration Ratings Based on the ANSI/IEC 6029 standard, the following enclosure ratings for the devices covered by this standard have been defined as:

Water Resistance IP X 4 — Water splashed against the device from any direction shall have no harmful effects.

Water Proof IP X 7 — Ingress of water in quantities causing harmful effects shall not be possible when the enclosure is temporarily immersed in 1M of water for 30 minutes.

Submersible IP X 8 — Ingress of water in quantities causing harmful effects shall not be possible when the enclosure is continuously immersed in water under conditions which shall be stated by manufacturer, but which are more severe than for IP X 7.


Impact Resistance is the height from which a device (including batteries) resists damage from dropping on a solid surface.

All Rights Reserved | Genesis Enterprises | Copyright