Lumen, LUX and PAR – Optimal Conditions with Mitras
LUX (lm / m2) is the unit of illuminance, indicating which luminous flux (lumens) falls on a defined area. The light output lumens (lm) as a measure of the brightness is normalized to the human visual sensitivity. Because humans perceive blue or red light less intense than the green light, the lumen decreases though contstantly high radiation levels the more blue or red the light is.
This is why, the specified lumens at our Mitras Daylight for example, are much higher than in the Mitras Actinic, though the wattage is almost identical.
The qualification of a luminaire only on the basis of lumens / watt (light output per electrical power) is not always appropriate as nothing is said about the photosynthetic efficiency of light
It is quite so that a luminaire with high lumens but unfavorable spectrum of photosynthesis is less beneficial than a luminaire with slightly less lumens but therefor optimum range.
More meaningful is the so-called PAR value (Photosynthetic Active Radiation), which describes the available radiation for photosynthesis.
All this offers the high-power Mitras LED illumination in perfection. Mitras Luminaires achieve above-average PAR values and thus ensures healthy growth in your aquarium.