Manual Growing lights
and UV spectrum for foraging, but do
not see in the red light spectrum. Conversely, humans do see in the red light spectrum but also in the
green and blue [...] following day. Never keep a
hive closed for longer than one day unless additional pollen is fed to the bees.
2.1 When to open and close the hives
In general [...] systems spread in the greenhouse for an optimal level of pollination
Two types of frames have been designed, one for 12 bumblebee hives and one for 4 bumblebee