Burn time (hours)
Brightness: the shape of the beam directly affects lighting distance
Lighting distance depends directly on brightness, but mainly on the shape of the beam. In fact, given the same brightness, lighting distance will vary depending on the shape of the beam.
Petzl indicates the different lighting modes available for each headlamp. These modes correspond to specific conditions of use: close-range work, moving around, seeing at a distance.
Optimized lighting performance: REACTIVE LIGHTING®
Brightness varies according to the user s need. Intelligent lighting thus optimizes battery life, offering greater burn time.
Prioritizing guaranteed brightness over time: CONSTANT LIGHTING Brightness stays constant as the batteries drain. When the batteries are almost drained, the headlamp switches automatically to low-level reserve lighting, to extend burn time.
Example of REACTIVE LIGHTING®
Example of CONSTANT LIGHTING
Example of STANDARD LIGHTINGPrioritizing burn time: STANDARD LIGHTING Brightness decreases gradually as the batteries are drained. It is the most common technology.
Brightness and burn time are two inextricably linked parameters of any headlamp, regardless of its lighting technology. For a given quantity of energy, increasing the brightness automatically decreases burn time, and vice versa.
The different lighting technologies used in Petzl headlamps make it possible to meet your needs, depending on what you want:
Prioritizing burn time over brightness
Prioritizing brightness over burn time
A question of balance
Brightness and burn time