1. Low power of a single LED. In order to obtain high power, multiple devices need to be used in parallel.

2. Low color rendering. The color displayed under LED illumination is not as real as that of incandescent lamps, which needs to be analyzed from the spectral distribution and is a technical issue.

3. Spot. Due to defects in the manufacturing process of white light LEDs and matching errors with reflective cups or lenses, it is easy to cause the problem of "yellow circles".

4. LED illumination uniformity issue. If secondary optical design is not carried out, the illumination of LED is relatively concentrated, so it is necessary to carry out secondary optical design to make its light intensity distribution map appear in the shape of a bat.

5. The issue of LED light decay. Compared to low-power LEDs, high-power LED street lights have much better light attenuation. But low-power LED emits very little heat. However, high-power LEDs have a problem that cannot be solved through heat dissipation, and the brightness will significantly decrease after heating, so the power cannot be increased. The largest Spark LED street light sold in the market is 360W.