LED fluorescent lamp , LED ceiling lamp, LED downlight, LED bulb, LED candle lamp, etc., the brightness is measured by the luminous intensity, and the luminous intensity refers to the luminous intensity in the direction of the normal line (the cylindrical luminous tube refers to its axis), that is, The luminous flux emitted by the unit solid angle, in units of candle light. Misunderstanding 1: The greater the power, the higher the brightness The brightness of an LED fluorescent lamp 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 luminous tube refers to its axis), that is, the luminous flux emitted by the unit solid angle, and the unit is candle light. Since the luminous intensity of a general LED fluorescent lamp is small, the luminous intensity is often used as a unit of millicandela. Generally speaking, the light source emits its luminous flux with different intensity in different directions, and the visible light radiation intensity emitted by the solid angle in a specific direction is called light intensity, which is simply referred to as axial brightness. On the LED fluorescent lamp, the higher the power, the higher the brightness of the product. Therefore, when we purchase the LED fluorescent lamp, we should pay attention to its axial brightness, not power. Misunderstanding 2: Take the actual lighting angle as an effective angle The illumination angle of the LED ceiling lamp is divided into an effective angle and an actual illumination angle. The angle at which the luminous intensity value is half of the axial strength value and the angle of the luminous axis (normal) are effective angles. The angle of view of the half angle angle (or half power angle) is the actual light angle. Angles other than half of the axial strength are not considered effective angles in practical applications because the light is too weak. Therefore, we should pay attention to the actual illumination angle of the product when purchasing the product. When calculating the quantity of products used in the project, the actual illumination angle can be used as the reference value. Misunderstanding 3: Expectation of actual service life is too high LED manufacturers expect LED lifetimes to reach 100,000 hours MTBF (mean time between failures, the standard used by traditional luminaire manufacturers to measure lamp life), but like all basic sources, LED lumens are also attenuated over time. Therefore, although LED ceiling lamps can be used for a long time, MTBF is not the only consideration for determining service life. The lumen attenuation of LED ceiling lamps is affected by many environmental conditions such as ambient temperature, humidity and ventilation. Lumen attenuation is also affected by control, thermal management, current levels and many other electrical design considerations. Many salesmen may give customers some ambiguous information for some reason when selling LEDs. For example, the life of LED fluorescent lamps is about 100,000 hours. The 100,000 hours here refers to the life expectancy of LED fluorescent lamps. As the light source of illumination, the brightness of the lamp has a process of gradually decaying and darkening, which is referred to as light decay. On the application-level LED fluorescent lamp, when the light decay exceeds 50%, the human eye can clearly feel the change of brightness. At this time, the brightness of the product is not suitable for illumination. Many manufacturers and contractors use low-cost LED fluorescent lamps for three months to half a year. It is often found that the brightness of LED bulbs is not as bright as when they were installed, or even close to none. It is because LED light is not considered to be degraded. s reason. In summary, when we buy LED fluorescent lamps, we should pay attention to its light decay speed, not the use time.
The Work Light is Ideal for mechanic's, DIY, boating, camping, night fishing ,Camping, Hiking, Workshop, Roadside safety, Auto repair, Emergency kits, Survival device, Home security etc.
Work Light Work Lights,Extendable Work Light,Rotating Work Light,Switch Light Ningbo Henglang Import & Export Co.,Ltd , https://www.odistarflashlight.com
Both Work Light's Base and Body have strong magnet to magnetize on metal surfaces for more convenience; Use Hook to hang on any place to provide brightness.
The Opereating Time of work light up to 6 Hours As Per One Fully Charged, It can Also be Used as a Backup Battery to Charge Your Phone or Other Digital Device.