LED Explosion-Proof Light Purchase Three Misunderstandings

Writer：Jane Time：2021-06-28 Browse：183

Mistake 1: The expectation of the actual service life of LED explosion-proof light is too high

LED lamp manufacturers expected LED life of 100000 hours MTBF (mean time between failures, explosion-proof lamps and lanterns manufacturers use traditional measurement standards) of life, but, like all basic lighting, the luminous flux of LED light source lumen attenuation with time, so, although LED explosion-proof light glow can be a very long time, MTBF is not the only consideration in determining service life. The brightness attenuation of LED explosion-proof lights is affected by many environmental conditions, such as ambient temperature, humidity and ventilation. Brightness attenuation is also influenced by control, thermal management, current levels, and many other electrical design considerations.

Many salesmen in the promotion of LED explosion-proof lights for some reason may provide customers with some fuzzy information, resulting in misleading, such as LED explosion-proof lights and lanterns in the service life of about 100,000 hours, 100,000 hours here refers to the manufacturer's expected service life of LED, but as a lighting source, The brightness of the explosion-proof lamp has a process of gradual attenuation and darkening (such as fluorescent lamp, energy-saving lamp), this process is referred to as light decline; Therefore, consumers in the purchase of LED explosion-proof lights should pay attention to the speed of its light decline, rather than the use of time, consumers must not expect too much of the actual service life.

Misunderstanding 2: the greater the power of the LED explosion-proof light brightness is higher

The brightness of LED explosion-proof lights is measured by the luminous intensity. The luminous intensity refers to the luminous intensity in the direction of the normal line (the axis of the cylindrical light-emitting tube), that is, the luminous flux emitted by the unit solid Angle, and the unit is Candela (Candela, CD). Due to the low luminous intensity of general LED explosion-proof lights, the luminous intensity is usually used as a unit of millicandela (MCD). Generally speaking, the light source will radiate its luminous flux in different directions with different intensities. The radiation intensity of visible light emitted by unit solid Angle in a specific direction is called light intensity, or axial brightness for short.

Misunderstanding 3: take the actual luminous Angle as the effective Angle

The luminous Angle of LED explosion-proof light is divided into effective Angle and actual luminous Angle. The Angle between the direction where the luminescent intensity value is half of the axial intensity value and the luminescent axis (normal direction) is the effective Angle. Two times the half-value Angle is the Angle of view (or half-power Angle), which is the actual luminous Angle. Angles beyond half of the axial intensity are not counted as effective angles in practice because the light is too weak.

Therefore, users should pay attention to the actual luminous Angle of the product when buying LED explosion-proof lights. When calculating the number of products used in the project, the actual luminous Angle shall prevail, and the effective luminous Angle can only be used as a reference value.