At the moment, manufacturers of lamps using LEDs of the 4 main American firms CREE Semiconductor SSCSeoul Korean American Japanese Nichia and Luminus.
The greatest variety of different CREE LEDs they are most popular and are used in 90% of the lights.
CREE XLamp MC-E
CREE XLamp XR-E
led average power with the maximum achievable luminous flux of up to 250Лм. Used in cheap flashlights small and medium power. Very popular for its low price and small energy consumption. Flashlight this led can work for long enough from a normal AA or AAA batteries at a luminous flux of about 100Лм. In lamps with a luminous flux of more 100Лм often use the combined power or 3haaa batteries or 1 Li-ion battery. This allows you to use the flashlight from conventional batteries are not buying the rather expensive pair of Li-ion battery + charger. As led is small in size it lends itself well to focusing and is used in most lens focused light.
CREE XLamp XP-G
CREE XML XLаmp
this led is a true breakthrough in the world of lights
- wide range of luminous flux from 250 to 1100Лм - excellent efficiency even when running at a quarter of nominal output - low price
Led CREE XML pushed out of the market lights a large part of the previously used LEDs such as SSC P7 CREE MC-E, Luminus SST-50. After the appearance of the lights on 3 or more XML diodes have handed over their positions the diode Luminus SST-90 lights which was considered the brightest among serially produced. Moreover the brightness of led lights at several XML diodes was compared to the brightness of the lamps to xenon lamps.The use of XML in lisovich lanterns lanterns with the focus of the beam was dictated by one big disadvantage lenses on XR-E diode - low brightness with a wide beam maximum defocusing. Brightness classic XR-E lisowice katostraficheski lacking for normal illumination of a large uniform circle of illumination. But the whole idea of the lens of the flashlight is its universality - the opportunity to Shine far and near. Problem solved mainly by reducing the maximum opening angle of the beam of light then there is this lamp still does not light.
With the advent of XML diode, this problem has been solved. Since these diodes are much brighter they provide sufficient brightness in a wide beam. However, a mistake to assume that a lens lantern on XML the diode will have a longer range beam. The structure features of led XML does not allow good enough to focus the beam in the usual ways. A large part of the light beam when the focus is lost on the inner walls of the lantern. Because of this features lens lights on the XM-L is not superior but not inferior to