The joint publication of the six ministries and commissions of the State Council has clearly promoted the rise of the LED industry. In recent years, with the rapid advancement of LED light efficiency and the significant cost reduction, the pace of LED entering the lighting field has obviously accelerated. The “LED Lighting Demonstration Project†project launched by the National Development and Reform Commission last year has made the enthusiasm of practitioners in this field unprecedentedly high. However, due to the general lack of knowledge and understanding of the standards in this field, companies and practitioners have caused LEDs. There are many common problems in the design of lighting products. If you do not seriously study and solve them, it will lead to more detours and waste a lot of resources. Careful analysis and study of these issues is an important task for the healthy development of this industry.
First, the main safety issues of road lamps
1. Unused tempered glass
According to the requirements of GB7000.5, road lamps, including tunnel lamps, should use tempered glass. The use of tempered glass not only requires the mechanical strength of the glass, but also the glass is broken. Normal glass is like the case of Figure 1. The glass fragments are large and many Sharp angles are easy to hurt when falling. If tempered glass is used, once the condition is broken, the tempered glass will break into many small particles with no obvious acute angle.
Figure 1: Glass shards after broken glass
2. The LED control unit is external, but the control unit does not have a separate mark.
The LED control unit is external and the control unit must be self-contained. With independent marking, it means that the relevant parts must meet the relevant requirements of the luminaire standard, such as: fixing device for external wires; protection against electric shock; temperature of mounting surface; IP (dustproof, waterproof) test, etc. It is only understood that IP (dustproof, waterproof) testing is required, so LED control devices that do not have a separate mark and are not tested for luminaire standards are not allowed to be external. A separately mounted control unit with a relatively complete marking is shown in Figure 3.
Figure 2: No stand-alone tag, just write IP67
Figure 3: Stand-alone control unit with a relatively complete mark
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