Plot hole that wrecked it for me (spoiler)
Near the end of the movie when they learn Andromeda uses everything for fuel, even the energy from an atomic blast, why didn't they realize Andromeda would use light as fuel? All that sunlight and artificial light should have had Andromeda growing and mutating like mad from the get go.
"Strange women lying in ponds distributing swords is no basis for a system of government."
-Dennis