Do you know all three parameters that are often misunderstood in the life of LED lighting fixtures?

QQ Phone East China Zhou Wenbiao //.ohzmdj.com/ In general publicity, there are three indicators that are easy to misunderstand, namely power, life and efficiency. In this issue, we continue to discuss the parameter-life span.

Lifespan is similar to power, and there are also commonly used concepts of lifespan, namely: the single life of lamp beads; the life of lamp beads in practical applications; and the life of driver. This life concept constitutes the life of the lamp, and the shortest part of the life determines the life of the lamp.

Here, I want to explain a common mistake, that is, the ten thousand hours statement. There is a special explanation on its official website. The main idea is: I found an independent third-party laboratory and tested it according to the LM-standard. Let's take a look at their lamps; as a result, under 'normal use conditions, Any changes in initial conditions or parameters will affect the service life of the LED to varying degrees.

Please note this passage: ** The name of the independent third-party laboratory is not given, so the original record is not public; **, the meaning of the so-called 'normal use conditions' is not given, please note This condition can be inconsistent with the 'daily use conditions'; *after, it is reminded that changes in the initial conditions or parameters will affect the life of the LED lamps. It can be seen from the above description that this experiment is for reference only and is not very rigorous, so the term 'ten-thousand-hour life' cannot be used as a reliable basis for publicity.

Generally speaking, under the condition of sufficient heat dissipation (here refers to the junction temperature, English is written as Tj, under the working condition of C), the life of the LED single lamp bead can reach 10,000 hours. The lifetime of this single unit is comparable to that of the LED under the actual working conditions of the lamp. Of course, since many lamps on the market currently cannot achieve the so-called 'sufficient heat dissipationShorter. Therefore, in general, the life of the lamp bead in practical applications is shorter than that of the LED single lamp bead, especially when the structure of the lamp is unreasonable and the heat dissipation cannot be fully guaranteed.

*Later, when it comes to the 'old difficulty' of LEDs, the lifespan of mainstream drivers on the market is much lower than that of LED lamp beads. Of course, the essence of the problem is due to the unreasonable driving technology structure, resulting in low efficiency, so that the temperature rise is too high; the temperature distribution caused by the technical structure is uneven, which greatly reduces the life of the LED driver.

In summary, these three concepts constitute the life of LED lamps, and the current main constraint is the life of LED drivers.