FAQ – Questions and answers
Do you use toxic or radioactive luminescent materials?
The luminescent materials used are not toxic or radioactive. All luminescent materials are tested and have EN 71-3 approval (Safety of toys standard).
How does the lighting effect work?
Our luminescent materials are charged by UV light or by the UV light component in light sources. The luminescent materials emit light in one color in the dark, when the incidence of light stops.
How long do the products illuminate?
To answer this, it is important to clarify the background to the question. If we reply to the question based on safety technology and emergency technology, the answer is "Over 20 hours up to several days, depending on the product". The reply is based on a technical measurement, which corresponds to 100 times the value of the limit of perceptibility of the human eye. The answer to this question - based on a background from the point of view of the consumer - it is eight to twelve hours, depending on the application. What is important here is that the products are made for darkness, i.e., the products are located in the dark and the eyes of the observer have correspondingly adapted to the environment.
Why does the lighting effect lose its luminous color during the night?
The human eye has two types of receptors for
the perception of light: retinal rods and cone cells. The rods do not perceive any colors - merely contrasts -, the cone cells perceive respectively red, green, and blue light and from that compile the color information for the brain. The cone cells need more energy to correctly convert the color information. If the lighting effect becomes weaker, the color of the lighting effect does not change; rather, the cone cells cannot obtain sufficient information from the incident light to recognize the colors, so the retinal rods work nearly exclusively and merely transmit the contrast.
I have tested the lighting behavior and after 2 hours, I can hardly detect any lighting effect. How could that be?
Our products are made for the dark. The best way to test our products is to use them at home. For instance, put one of our products on a nightstand for several days. You will notice that our product can be perceived well or extremely well at different times throughout the night because the product is being used in the correct context and because your eyes are used to the dark. A light duration test during daytime has the disadvantage that the eyes are not adapted to the high luminous intensity, so it is not possible to check the light duration, for example, during a coffee break as you should be in the dark for at least 20 minutes to let your eyes get accustomed to the dark.
Does the lighting effect age over the course of years?
The luminous materials and the lighting effect do not age and are not dependent on the ageing of the substrate. If our products are used in a substrate that yellows under UV light over the years, the charging of the luminous material and the emission of the light is impaired.
What applications are not suitable for your products, i.e., what are the limits?
Our products are made for darkness and do not substitute any application area in which the constant light duration of light sources is demanded, for instance for advertising signs. If you are planning to use our products in the design sector, please prepare a concept for illuminating our materials and play around with shining a light on the objects and putting them or parts of them in the dark.
For your information: Black light charges the phosphoresce luminous material well, so you can work well here with "light on - light off" light shows.
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