In general publicity, the most misleading indicators are power, life and efficiency. In this installment, we continue our discussion of the parameter, life span.
Life and power are similar, and there are three commonly used life concepts, which are: 1. 2. The service life of lamp beads in practical application; 3. Drive life. These three life concepts constitute the life of lamps and lanterns, and the part with the shortest life determines the life of lamps and lanterns.
Here, I would like to explain a common mistake, which is the statement of 50,000 hours. There is a special description on its official website. As a result, under "normal operating conditions", the lamp life was 50,000 hours after 6000 hours of measurement. , any change of initial conditions or parameters will affect the service life of LED to varying degrees.
Please note that the name of the independent third party laboratory is not given in the first paragraph, so the original records are not disclosed. Second, it does not give the meaning of the so-called "normal use condition". Please note that this condition may not be consistent with the "daily use condition". Before the end, it is reminded that changes in initial conditions or parameters will affect the life of LED lamps. As can be seen from the above statement, this experiment is only for reference and not very rigorous, so the "50,000 hour life" theory cannot be regarded as a reliable basis for propaganda.
In general, the life of a single LED bulb can reach 35,000 hours with sufficient heat dissipation. The life of this monomer can be compared with that of the LED when the lamp actually works. Of course, because a lot of lamps and lanterns on the market cannot do so called "sufficient heat dissipation" at present, that is to say, often the junction temperature of LED lamp bead is 950C or 1000C, or even higher, so the life of lamp bead in practical application is shorter. Therefore, generally speaking, the life of lamp beads in practical application is shorter than that of single LED lamp beads, especially when the lamp structure is unreasonable and the heat dissipation is not adequately guaranteed.
When it comes to LED's "great difficulty", the current mainstream drive life in the market is much lower than that of LED lamp beads. Of course, the essence of the problem is that the driving technology structure is not reasonable, resulting in low efficiency, so that the temperature rise is high; Due to the uneven temperature distribution caused by the technical structure, the LED drive life is greatly reduced.
In conclusion, these three concepts constitute the life of LED lamps, among which the main restriction factor is the life of LED drive.