Mechanism Analysis of Light Failure Characteristics of T5 Fluorescent Lamps

Abstract: This paper briefly analyzes the light decay characteristics of T5 fluorescent tubes and the three stages of the effects of fluorescent tube photo-damage characteristics, which tend to be scientific and reasonable technical factors. The basic concept of the scientific relationship between the three stages of light decay characteristics is proposed. For scientific selection when using T5 fluorescent tubes.

Key words: T5 fluorescent tube T5 fluorescent tube T5 energy-saving lamp light decay light decay rate light decay characteristics fast decay of light decay phase of light decay stable phase of light decay three phases proportional relationship

I. Overview Fluorescent lamps are gas discharge illuminating electric light sources, which are divided into T12, T10, T8, T6, T5, T4, T3, etc. according to the pipe diameter. Currently, T8, T6 and T5 are the mainstream. Especially due to the technical characteristics of T5 fluorescent tube, advanced technology, high luminous efficiency, excellent lighting quality and excellent effect, T8 fluorescent tube is being replaced at a faster speed. T5 fluorescent tubes are classified according to technical quality: T5 fluorescent tubes and T5 energy-saving lamps. From the perspective of production into a complete lamp, it is divided into two types: T5 fluorescent lamp and T5 energy saving lamp. The technical performance of the two in terms of light efficiency, power saving rate, lighting quality and effect, and life span are quite different. The technical quality of the T5 energy-saving lamp is significantly better than that of the T5 fluorescent lamp. One of the most intuitive and very important technical quality parameters is the light decay of the T5 fluorescent tube. Whether the light decay rate and the degree of light decay of the T5 fluorescent tube are serious, it has a decisive influence on the illumination quality, effect and life of the T5 fluorescent tube.

Second, T5 fluorescent tube light decay phenomenon

T5 fluorescent tube, in the ignition operation, under the premise that the electric power of the whole lamp is not reduced. The luminous flux produced by the fluorescent tube will gradually decrease with the ignition time, and the brightness and illumination of the whole lamp will decrease. This phenomenon is called the light decay of fluorescent tubes.

Third, T5 fluorescent tube light attenuation characteristics

T5 fluorescent tube, in the ignition operation, its light decay value as a function of ignition time, called light decay characteristics. The light decay characteristic curve of the T5 fluorescent tube is not a linear straight line. The test proves that the light decay characteristic curve of the T5 fluorescent tube is a non-linear curve composed of three straight lines with different slopes. The approximate straight lines of the three different slopes correspond to the three operating phases of the T5 fluorescent tube throughout its life cycle. Namely: rapid phase of light decay, stable phase of light decay, and intense phase of light decay.

Technical analysis of the light decay characteristic curve of T5 fluorescent tube

First, the T5 fluorescent tube produces light decay, which is essentially the reduction of the luminous efficacy of the fluorescent tube. It is an inevitable technical phenomenon.

Second, since the light decay of T5 fluorescent tube is a technical phenomenon, it has its unique technical characteristics. For the sake of simplicity, we will illuminate fluorescent tubes from the beginning of ignition to the end of life. From the perspective of the rate of light decay, it is divided into three stages.

1. Fast phase of light decay: This segment is mainly expressed in the fluorescent tube, the initial stage of ignition. It is characterized in that the luminous flux of the fluorescent tube drops from the initial value at a faster rate and tends to be stable. During this period of time, the luminous flux of the fluorescent tube decreased more significantly.

2. Light-stable stabilization phase: This segment refers to a fairly long period of stable retention of fluorescent tubes after a rapid phase of light decay. It is also the main ignition stage of fluorescent tubes. It is characterized by the rate of light decay of the fluorescent tube: it tends to be stable, and the entry is relatively stable and stable for a considerable period of time. During this period of time, the luminous flux of the fluorescent tube does not decrease significantly, and the luminous flux remains relatively stable.

3. The stage of intense light decay: This section refers to the ignition life of the fluorescent tube, which tends to be in the final stage. It is characterized by a sharp rate of light decay of the fluorescent tube. The luminous flux of the fluorescent tube drops sharply, accompanied by phenomena such as flashing of the luminous flux, jitter, and difficulty in starting the glow. Fluorescent tube life quickly entered the end.