Procognitive technology
Features of the full-spectrum procognitive LED technology
The following characteristics must be observed for full-spectrum LED luminaires to achieve the desired image forming and non-image forming biological effects without the risk of negative side effects.
Examples of suitable and unsuitable spectral compositions of a procognitive LED light (the white curve shows the spectral waveform of natural sunlight 5,000 Kâš (CIE standard daylight illuminant D50)
Recommended spectral and light engineering parameters of procognitive full spectrum light sources:
- Equilibrium of the spectral composition and the sun mimicking effect. In the 450-650 nm band, a balanced representation of all wavelengths is achieved with a maximum deviation of ±15% (so-called full-spectrum artificial light source)
- Balanced melanopic energy. To support circadian rhythms, the spectral composition must not show a dip in wavelengths in the 460-540 nm region (typical of conventional LEDs)
- Minimum harmful blue light. In the 415-455 nm band, a maximum of 10% of the so-called harmful blue light is emitted
- CCT corresponds to bright daylight (4,500-5,000 K)
- Colour rendering index CRI Ra greater than 91
- UGR glare factor less than 19
Other recommended parameters:
- L80B20 lifetime of at least 70,000 hours
- Energy efficiency matching the latest LED technology
- Warranty of luminaires for at least 3 years
