How to Choose a LED Flashlight

How to choose a front LED flashlight? All the answers to your questions.

What is Lumens?

The Lumen describes the total amount of light produced by a light source.
This amount is measured in all directions with an integral sphere. The lamp to measure is installed in this sphere which determines the amount of total light emitted.
The Lumen is a good indication of the lamp power. It does however no information on the concentration of the light beam, which depends on the quality of the optics.

A good lamp should produce how many lumens?

… Depending on your use.

For a specific need as the DIY or for use in troubleshooting a lamp producing 20 lumens should be to illuminate a small area. If you want a broader lighting, it takes 60 lumens surroundings.

For running, a lamp that delivers 250 lumens widely suitable for use in the paths.On the other hand trails over rough terrain (UTMB for example) we recommend the higher powers of 350 to 400 lumens. The latest version of the Petzl NAO lamp with its automatic Adaptive system of power and capacity of 550 lumens is particularly recommended.

For mountain BIKING, ski touring and cross-country skiing it is necessary to ensure broad and powerful lighting. Please choose a lamp producing a minimum of 500 lumens. Indeed more one moves quickly more it is necessary to widely enlighten the nearby area while ensuring good visibility at long distance.

For downhill biking, freeride or speed is important, it is imperative to get closer to the power of a car headlight is around 1200 lumens and more. Attention to the autonomy which must be adapted to your use. These high-performance ultra lamps ship technology of LED lighting and accumulators of past generations as the lamp front LUPINE PIKO RX4 which delivers 1500 lumens

What is the unit of LUX?

The Lux describes the amount of light that is received per unit area. This is the unit of measure of the illuminance. A lux (1 lx) is the illumination of a surface that receives, in a uniform way, a luminous flux of one lumen per meter square. It gives an indication of the light output of a beam that illuminates an area. This unit is less used by lamp manufacturers because it tended to support the beams lamps very focused what we rarely.

What does the IPX class mean?

The IPX class describes the resistance level of your headlamp to splash water and moisture. There are 9 different classes ranging from IPX0 to IPX9.
0 = no protection and 9 is the maximum protection. All good headlamps offer an IPX classification between 4 and 7. An emergency outdoor lamp must be watertight to immersion (IPX8 or IP67). Running feet and the trail we recommend headlamps in the category IPX6-for lamps for the bike and ATV it is best to take an IPX6 lamp that will stand up in a fall in the mud or in the case of very heavy rain.

An LED lamp heats?

The LEDS used in the powerful headlamps emit a very important light flow. All electric power is not transformed into visible light and some of this energy is converted into heat. To limit the temperature rise of the light source LEDS are mounted on a heat sink, which will allow the dissipation of the heat. Some models are designed so that the air flow that circulates increases the cooling of the lamp. When the headlamp is used as the cooling is not sufficient, the lighting is then decreased electronically to protect the LED and increase the life of your lamp.

The use of a headlamp in the winter or mountain reduced autonomy?

A headlamp is implementing more often than accumulators or batteries installed on the headband. When temperatures are low your flashlight loses autonomy because the electrochemical mainboard necessary for the electricity generation is slowed down when temperatures drop.
Alkaline batteries are functioning more normally negative temperatures. Most of the batteries can no longer deliver the amount of energy when temperatures drop.
This is why if you have to use a headlamp when temperatures we recommend to use use with batteries or the remote batteries. You can then install the door block batteries or accumulators under your protective clothing to keep the batteries or accumulators at a temperature higher than 10 ° c.
The batteries and lithium batteries are much less sensitive to temperature. If you go on mountain, if you use your lamp for skiing or mountaineering, we recommend a lamp whose batteries can be installed inside a jacket. You will also need to equip you in addition to a watertight backup equipped with a long-lasting lithium battery lamp. Your lamp serra always available regardless of the temperature and the duration for which you have stored this emergency lamp (10 years).

How many charge cycles – discharge a battery Li-ion can accept?

Between 400-1000 cycles. Which allows to consider considering 200 charge cycles in the year (professional use) a life expectancy of 2 to 5 years for rechargeable lights that have the latest technology (Li – ion – LiPo). It is now possible to recharge a lamp not completely discharged without risk of deterioration in the capacity of the accumulator.

What guarantee is offered with a headlamp?

You get a 2 year warranty against a defect of the purchased material. If the headlamp is equipped with a latest-generation Lithium rechargeable battery, it is usually covered by a 6 month warranty. Be sure to charge your lamp at 50% if you store it for a period of time of 3 months to prevent the battery from being damaged. If you store the battery for more than 3 months, you must download it and recharge it every 3 months.

Some manufacturers offer the additional guarantees that may extend the warranty of 2 years.

What is the life expectancy of my front?

It will depend on your use and build quality that meets criteria of strength of materials and quality of design: products for professionals are often more robust such as Petzl and Peli. Marks is also a reputation of quality and exceptional durability as Lupine and Silva.
Finally, the LED light source is designed for a duration of use widely more than 10 years in case of intensive use.

Do not hesitate to call the 0811 380 630 (cost of a local call) Elumeen teams to ask about the quality of the products. Thanks to our experience we can guide you to the products that are most suitable and are the best use/quality/price ratio.

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