T8 is a code represents a type of tubes with diameters of one inch. T8 LED light tubes are mostly used LED tubes at present. Although the light efficiency of LED light sources is much higher than before, there are still some difficulties in replacing traditional fluorescent tube directly by LED tubes. In accordance with lighting standard of fluorescent tube, a 36W traditional tube should at least have a luminous flux of 2400lm. At present, among T8 LED light tubes, the highest luminous flux is around 2200lm (with a power consumption of 21W). However, cooling system of this kind of tubes cannot be contained within semi-circular pipe but trapezoidal pipe which provides larger spaces. In today’s manufacturing technology, it is impossible to create a T8 LED tube with trapezoidal-shaped cooling components. Cooling system will be the bottleneck for high power T8 LED tubes. According to present lighting efficiency of LED lights, T8 LED light tubes with a luminous flux more than 2000lm will suffer cooling problems. This type of lights cannot work for a long time and more prone to failure. Commonly used T8 LED tubes have a luminous flux of 1300lm-1500lm. This type of LED tubes cannot be used to replace traditional fluorescent tubes. This is a main reason why LED tubes are hardly to be accepted by customers. Many buyers complained that their rooms looked much dimmer than before.
In addition, LED tubes tend to follow the step of fluorescent tubes: becomes more and more thin. T5 LED tubes started to emerge in lighting market in few past years. However, this kind of herd behavior is totally wrong. It is an inevitable trend for fluorescent tubes, since a thinner tube can dramatically improve the lighting efficiency of a fluorescent tube. But situations are totally different for LED tubes. The thinner the tube, the harder for the heat dissipation. Meanwhile, spot phenomenon is inevitable if light sources are too closed to the cover, which will reduce light transmission ability of the cover, and consequently the high lighting efficiency of LED lights.
Designs of T8 LED light tubes should not be restricted by traditional ideas. Normally, places in which tubes are installed have larger space. It is uselessly to use thin LED tubes, just for a beautiful view? It is unnecessary. Our design object is to satisfy customers’ brightness requirements together with suitable cooling systems.