Factors Influencing Glow Time of Luminous film

We know that luminous film can absorb light from a light source, store it, and then glow in the dark. Luminous film has a lifespan and will gradually reduce its brightness as the use time increases. The duration of the luminous effect of the luminous film is affected by many factors:

1. Types of luminous film

Short-term luminous film

Some low-quality or short-term luminous films may only last for 1-2 hours. This type of luminous film usually uses a simpler luminous material formula and has a shorter luminous duration. For example, the luminous film used on some cheap children's toys will stop emitting light soon after absorbing light.

Long-term luminous film

After high-quality long-term luminous tape fully absorbs light, the luminous effect can last for 8-12 hours or even longer. This type of luminous film usually uses advanced luminous materials, such as rare earth-doped aluminate luminous materials. The long-term luminous film used in some high-end building signs or emergency indication systems can continue to emit light of sufficient brightness throughout the night after being exposed to light during the day to meet indication and safety needs.

2. Light intensity and duration

Light intensity

If the light intensity absorbed by the luminous film is weak, such as the light absorbed on a cloudy day or in a dimly lit indoor environment, the duration of its luminous effect will be relatively short. For example, the luminous film exposed to a cloudy environment may only last for 3-4 hours of luminous effect, while the luminous film exposed to sufficient direct sunlight will last significantly longer.

Light duration

The duration of light exposure also affects the duration of the luminous effect. If the luminous film is only exposed to light for a short time, such as a few minutes, then the energy it stores is limited, and the duration of the luminous effect may only be 1-2 hours. On the contrary, if the luminous film is exposed to sufficient light for several hours, it stores more energy, and the duration of the luminous effect will increase significantly.

3. Usage environment

Temperature environment

In a low temperature environment, the luminous efficiency of the luminous film will be reduced, and the duration of the luminous effect may be shortened. For example, in the cold winter outdoors, the duration of the luminous effect of the luminous film may be reduced by 1-2 hours compared to the normal temperature environment. In a high temperature environment, if the temperature tolerance range of the luminous film material is exceeded, it may cause irreversible damage to the performance of the luminous material, resulting in a significant reduction in the duration of the luminous effect or even loss of the luminous ability.

Humidity environment

A high humidity environment may have a certain erosion effect on the luminous film, especially for some luminous films with poor protective performance. In a long-term high humidity environment, the duration of the luminous effect of the luminous film may gradually shorten, and problems such as reduced luminous brightness and changes in luminous color may occur.