LED lights have the advantages of energy saving and environmental protection, but after using these LED lamps for a long time, compared with the traditional lighting equipment, it is found that LED lamps still have shortcomings.
First, the heat dissipation problem of the lamp and its related safety issues The most important thing for the stage lighting is to have safety and stability.
Through long-term use at the Shanghai World Expo, it can be seen that LED lamps have great advantages in terms of safety. For example, the waterproof characteristics are obvious, and the probability of short circuit can be greatly reduced in rainy days or in a relatively harsh working environment. However, the heat dissipation problem of LED lamps has not been the ideal solution, especially for high-power LED lamps. As long as the heat dissipation system of the lamps is designed, the use of LED lamps in the stage performance can largely avoid the ignition of set items and the like. Danger.
Second, color rendering needs to be improved
The use of LED luminaires on a large scale on the stage requires extremely high color rendering. The high-power LED lamps used in the Shanghai World Expo Park can replace the traditional light source PAR lamps, daylight lamps, floor lamps, floodlights, backlights and other stage lamps, although with the continuous development of LED technology, LED color development Sex has been greatly improved, but its color rendering is still not comparable to lamps using traditional light sources.
Third, there are high requirements for ambient temperature
LED lamps can maintain good stability and ensure the life of the light source is based on good control of the temperature of its working environment. The brightness of an LED luminaire is inversely proportional to temperature. It is very sensitive to temperature changes. The encapsulating resin degrades rapidly under high temperature and strong light, which affects the standard performance and service life of the light source. In comparison, traditional luminaires are much less affected by ambient temperature. This is also an important factor restricting the application range of LED lamps.
Fourth, the cost is higher
The energy-saving characteristics of LEDs are unquestionable. However, LED light sources cannot directly use 220V AC power. They must be driven by a complex conversion circuit with low-voltage constant current, which requires high efficiency of electro-optical conversion and loss of each conversion link. The rate is lowered to low, which will undoubtedly increase the technological content of the products, making the single cost of LED lamps much higher than ordinary lamps. As mentioned before, the service life of LED has a great relationship with the ambient temperature. If the cost of the unit is high and the service life is not guaranteed, then the use of the product is of little significance. This contradiction will be one of the important issues that need to be solved in the future development of LED stage lighting.
In summary, the understanding of LED lamps can be summarized as follows: If the temperature is not very high, the safety of LED lamps is quite guaranteed, and it is more waterproof, explosion-proof and low-energy than conventional lamps. Advantages; from the point of view of the performance of the luminaire, for places with high color rendering requirements, such as scene dyeing for high reduction requirements, reduction of face color and other places sensitive to color reproduction, it is necessary to select The color rendering index meets the requirements of LED lamps. However, for some large-scale color, such as large-area backlighting, instead of the traditional PAR lamp plus color changer, LED lamps are no problem; from the cost factor, LED The lamp has the characteristics of energy saving, environmental protection and long service life. Long-term use will save a lot of resources, but the one-time investment is high, and the temperature of the working environment needs to be well monitored during use.
