bumblebees to pollinate. For pollination, bumblebees need at least 28 Watt/m2 PAR light near the hive and the presence of Ultraviolet light. …
back to the hive. For effective orientation they need at least 28 Watt/m2 PAR-light or 56 Watt/m2 sunlight at the location of the hive. Depending on…
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