Some of the LED Tube Lights on the cognitive errors

Myth one : the greater the power the higher the brightness
The brightness LED tube light luminous intensity to measure light intensity fingering line ( pair of cylindrical light emission tube is its axial ) direction of the luminous intensity per unit solid angle of the luminous flux emitted by the unit is candlelight . Due to the general LED tube light luminous intensity, luminous intensity so common units of milli- candela for . Typically , the light source to the different intensities in different directions to the luminous flux emitted in a particular direction per unit solid angle of the visible radiation intensity emitted light intensity that is called , referred axial brightness. The greater the power of the LED is not on the higher brightness products , so we choose to look at when LED tube light is its axial brightness, rather than power .

Myth: The actual light angle as effective angle
LED emitting angle is divided into effective and practical light-emitting angle perspective . Luminous intensity is half the value of the direction of the axial strength of the light emitting axis ( normal ) angle of the effective angle. Half-value angle 2 times the angle ( or called half-power angle ) is the actual light angle . In the other half of the angle of axial strength because the light is too weak in practice not included in the effective angle . So we should be concerned about when purchasing products emitting angle of the actual product , Computational Engineering Products Used in quantities subject to actual light angle , the effective light angle can be used as reference values. led tube


Myth: high expectations for real life
LED tube light manufacturers predict LED tube light life of up to 100,000 hours MTBF (mean time between failures , conventional lamp manufacturers to measure source life of the standard ) , but like all basic light sources , LED's lumen depreciation over time decay , so although LED light time can be very long , MTBF is not the only consideration in determining useful life . LED lumen depreciation is affected by numerous environmental conditions such as ambient temperature, humidity , and ventilation , Lumen depreciation is also under control , thermal management , current levels, and many other electrical design considerations. Many sales in the marketing of LED when for some reason may be to provide customers with some vague information , misleading , such as LED life of 100,000 hours or so, here is 100000 hours LED life intended by the manufacturer , as lighting source, lamp brightness has a gradual decay darkening process, which referred to the light fades . At the application level of the LED , the light fades more than 50 %, the human eye can clearly feel the change in brightness , when the product brightness we think does not apply to lighting. Many producers and engineering companies in the use of low-cost LED three to six months or so, often found significantly less brightness of the LED tube lightwhen just installed , and even almost non-existent , it is because there is no consideration to the LED light failure causes. In summary , we have to pay attention when you buy LED light decline is its speed , rather than the use of time .LED tube light