An OptiClimate canopy temperature camera can be connected to the system to monitor evaporation from the crop: an excessive canopy temperature is indicative of problems with the plants' evaporation capacity (for example, due too little water or excessive light).

If the canopy temperature rises to an excessive level then the DimLux ballasts are dimmed or switched off until the temperature falls to an acceptable level: failure to lower an excessive canopy temperature would result in the plants reducing their evaporation capacity by closing the stomata, which would in turn shut down the assimilation of CO2 and photosynthesis – and halt growth. A prolonged shutdown will ultimately result in scorched foliage and cause irreparable damage to the plant's 'engine' (the foliage). The canopy temperature is of greater importance to plants than the ambient temperature!