Photobiological safety: Measuring and recognising the blue light component of an LED

LED lamps emit a considerable amount of blue light in their light spectrum.

Artificial light mostly consists of LED lamps, which have an increased blue component. More and more studies show that increased blue light, to which we are increasingly exposed in our everyday lives, can have serious consequences for our health. This is known as the blue light hazard.

The effects on the human organism occur in various forms and range from sleep disturbances to a reduction in visual performance to long-term damage to the cells in the retina. This can occur when the human eye is increasingly exposed to increased levels of blue light and the natural regeneration of the retina overnight is no longer sufficient.

The use of laptops, smartphones and staying in a room with artificial light, can strongly influence the sleep process, which suppresses the important melatonin production (sleep hormone) during sleep.

The main task of the hormone is in fact immensely important: it regulates the sleep-wake rhythm and thus ensures a healthy body and mind. In the evening, melatonin makes you tired and ensures that sleep is restful.

Melatonin = Antioxidans

This hormone is also the body’s own antioxidant. It fights stress, reduces cell damage to the body and provides a natural balance. It is also known that a healthy melatonin level can prevent cancer. In addition to regulating the day-night rhythm, numerous other effects are attributed to melatonin, including a positive influence on the immune system.

Blue light measurements

We at BioEnergy are now able to measure blue light levels with the help of measuring instruments. Besides the harmful effects of artificial light, the colour spectrum in a room without daylight is also distorted. This means that the colours of clothes will look different. Have you ever bought clothes and been disappointed when you looked at them at home in daylight? About 90% of the information a person perceives is based on the sense of sight. A clear colour classification is only possible with the common spectral composition of daylight. Even with normal artificial light, colour reproduction is distorted. Red can then suddenly appear orange or blue violet.

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