How is Petzl lighting performance measured? - Petzl Other
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How is Petzl lighting performance measured?

Warnings

  • Read the technical notice before viewing the following techniques.
  • It is important to fully understand the information provided in the technical notice before using this complementary information
  • Mastering these techniques requires training.
  • Consult a professional before attempting to perform these techniques on your own.

Brightness

Brightness (or luminous flux) is the total quantity of light emitted in every direction from a source of light. It is expressed in lumens (lm) and is measured in the laboratory with a sphere.

Brightness is measured in the laboratory with a sphere.

The higher the lamp's lumen value, the more light it emits, thus enabling better vision.

Measurement:

Brightness is measured when the lamp is turned on, using new batteries.

Burn time

Burn time is a key factor in lamp selection, as it determines the effective duration of usage.

Measurement:

Petzl measures the burn time of its lamps according to protocols adapted to each technology used:

For STANDARD LIGHTING:

The measurement is made from when the lamp is turned on until the user cannot move for lack of visibility; this value has been estimated to be 0.25 lux at 2 meters (equivalent to a full moon night).

For STANDARD LIGHTING

For CONSTANT LIGHTING:

Measurement is made from when the lamp is turned on, until it switches to reserve mode.

For CONSTANT LIGHTING

For REACTIVE LIGHTING:

Measurement is made from when the lamp is turned on, until it switches to reserve mode.

For REACTIVE LIGHTING

Lighting distance

Lighting distance depends directly on brightness, but mainly on the shape of the beam.

For example, 100 lumens of light will project to 40 meters with a very wide beam, but up to 100 meters with a focused beam.

Measurement:

This is the maximum distance between the lamp and the location where only 0.25 lux of illumination remains. Measurement is done when the lamp is turned on, using new batteries.

• Lux is the luminous flux per unit of area.

All of our lamps are tested at an ambient temperature of 22° C (+/- 3° C).

These specifications may vary depending on usage conditions (battery quality, cold temperatures...).


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