Manual Growing lights
closing of the hives. The
bumblebee hives should be closed 2 hours before sunset or 2 hours before the screen is closed.
If there is no light sensor available [...] also important to give the
bumblebees the opportunity to work during the hours with the most daylight. Therefore, we advise using an
automatic opening and [...] ely 1 hour after the growing lights come on and start to close 10 to 12 hours later.
Switching on the growing lights before midnight, causes the flowers