Diode model
Model of the LED(s) used in the flashlight. Knowing the exact name of the LED, you can find its detailed characteristics and evaluate the capabilities of the flashlight. In addition, this information may be useful when replacing a failed diode.
Note that the LED model is indicated mainly if it is a high-quality LED with advanced characteristics. Such light sources are produced by different manufacturers, but the most popular in modern flashlights are products from Cree with its series
Cree XM,
Cree XP,
Cree XHP. Here are some of the most common LEDs from this brand:
Cree XP-L,
Cree XM-L2,
Cree XP-E,
Cree XP-G,
Cree XM-L T6,
Cree XM-L2 T6,
Cree XM-L U2,
Cree XM- L2 U2,
Cree XP-G R5,
Cree XP-G2 R5,
Cree XP-E Q5.
Cree XM-L and XM-L2 series diodes are used in high-power flashlights. XP-G and XP-G2 are used in relatively small models. They produce a beam of light in the shape of a circle with a darkening inside when using a reflector to focus. XP-E and XP-E2 are a godsend for small items with an evenly f
...ocused beam and even illumination on the sides. The number “2” in the designation of the diode model indicates increased brightness (compared to the basic modification). The XHP series is also gaining popularity - the LEDs in this line more than double the light flow. At the same time, they are compatible with standard printed circuit boards and optics. The numerical prefix 35/50/70 in the name of XHP diodes indicates the dimensions of the housing.
Along with solutions from Cree, high-quality LEDs from the American manufacturer Luminus are often found in flashlights. Its range includes both inexpensive diode options for budget flashlights and advanced LED light sources with high luminous brightness and luminous flux intensity for the most powerful flashlights.
A separate case is represented by diode plates made using COB technology (chip-on-board, that is, “chip on a board”). Such plates are arrays of a large number of miniature light sources, soldered directly into a printed circuit board at a short distance from each other and filled with a special composition; This composition performs two functions at once. First of all, it protects the LEDs from contact with air, which increases their service life; In addition, the coating effectively diffuses light, creating a uniform luminous flux.
Note that previously, to create LED arrays, SMD technology was mainly used, with individual LEDs soldered onto the surface of a printed circuit board. However, COB is a more modern and advanced option: this technology allows small but bright light sources to be placed at very high densities, achieving powerful lumen output even with small array sizes. In addition, SMD boards did not provide a protective coating.
In general, it makes sense to pay attention to flashlights with COB plates if you need a high-quality source of diffused light. As a result, such diode arrays are especially popular in travel lanterns and auxiliary lighting (see "Type"), but can also be used in other varieties - from ultra-compact key fobs to high-power hand-held lamps.Lighting range
The maximum range at which the flashlight provides any effective illumination of objects. Different manufacturers have different criteria for this efficiency when measuring ranges, and therefore it is only possible to unequivocally compare among themselves in range only models of one manufacturer. At the same time, this parameter allows us to compare models from different manufacturers with some certainty: for example, flashlights with a lighting range of 15 m and 100 m will clearly belong to different range classes, regardless of manufacturers.
Note that the range of illumination depends not only on the maximum luminous flux provided by the lantern (see above), but also on the features of its design: the narrower the beam is provided by the reflector of the lantern, the greater the range will be, and vice versa — scattered light does not spread far. Some models allow you to adjust the beam width depending on the requirements of the situation (for more details, see "Adjusting the focus").
It is also worth bearing in mind that models with the same claimed lighting range can cover different spaces. For example, a hand lamp (see Type) with a reflector diameter of 20 cm will be able to provide a wider beam than a conventional hand lamp with a 5 cm reflector. And although in both cases the objects that fall into the light spot will be illuminated in the same way, however, in the first case, the size of the spot itself will be larger, and the actual efficien...cy of the flashlight will be correspondingly higher (in light of the fact that it is easier to "feel" individual objects with a wide beam, especially at a considerable distance).
Power Bank function
The ability to operate the flashlight in power bank mode — an external battery for various portable devices, primarily smartphones and tablets.
The Power bank mode allows you to recharge portable gadgets from your flashlight's own battery. It can become a real salvation in nature or on the road, when there are no sockets and other power sources nearby, and you need to charge the gadget urgently (for example, if we are talking about a phone used as the main means of communication). Of course, such charging wastes part of the battery energy and reduces the battery life of the flashlight itself. However, models with this function, usually, use fairly powerful batteries with a good supply of energy, and their battery life remains very decent even after working in Power Bank mode. And some flashlights even have built-in limiters that do not allow you to discharge your own battery “to zero” when charging an external device.
