Choosing a Flashlight

Understand benefits of lanterns lighting is essential to choose flashlight suitable for each night race. These benefits are related to notions such as luminous flux, the scope of lighting, the shape of the light beam, autonomy and the regulation of lighting. We will discover what these parameters mean.

Luminous flux

A headlamp, luminous flux, expressed in lumens (lm), indicates the total amount of visible light emitting a flashlight. It is the equivalent in the horsepower of a car or a motor. For example, the Ferei Running HL50, emits a light output of 1800 lumens in maximum mode.

The amount of light required varies depending on the people, the nature of the terrain, the distance of each race and the planned speed. However, a good luminous flux will see better, save and go faster. For the technical trails, recommended a power exceeding 150 lumens.

Scope of lighting

The amount of light received by a surface decreases depending on whether it is near or not of the light source. It is the notion of the illuminance is measured in lux. For the manufacturer of torch, the scope of the lighting indicates the distance up to which the amount of light received on a surface is equivalent to the amount of light of a night of full moon (i.e. 1,80 lux). For example, a HL50 Ferei Running in maximum mode at a distance of 1800 m. At 1800 m, the light that emits is the same as a night of full moon, i.e. 1,80 lux.

Shape of the light beam

For a same light output, according to the models of flashlights, you can evenly distribute the flow in a large space or concentrate it on a small area to achieve a greater range. This type of lighting is recommended for technical trails, when it is necessary to see far and fast. For a career type «classic» trail, is interesting to have a mixed lighting, which combines a comprehensive and focused beam of light.

Autonomy

The autonomy of a flashlight should relate to the duration of the race. It is the duration during which the lighting is superior to the brightness of a full moon night (1.80 lux) and is indicated in minutes. For example, a HL50 in a powerful way, to a range of 3 h 15 min means that after 3 h 15 min
the lighting of a HL50, two metres, is a night of full moon, or 1.80 lux. According to the models of flashlights, the progression of the power of light in the time is handled in two different ways: lighting regulated and non-regulated lighting.

Ways of carrying the torch

Lanterns are presented in two categories: “all in the head” or version # (lighting head, displaced energy source). Versions # lighten the weight in the head. Displaced battery allows you to have a source of energy that can take shelter from the cold under clothing. Thus, the energy available is better preserved.

 

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