When tomatoes & cucumbers are cultivated as a high-density crop, the amount of light which reaches the middle and lower canopy layers can decrease. The amount of light which reaches the middle and lower level can be as less 33% and 18% respectively, of the light that falls on the top canopy. This can, in turn, lead to a lower rate of photosynthesis. It is therefore advisable to use lights at mid-canopy levels through inter-lighting LEDs as well as bottom lighting to provide more light to the lower canopy levels.