I had a few lady bugs in my tent and they were ripping up the fungus gnats! Definitely good to have. I just read during flowering they can die in the buds and the buds will grow over the corpse. I would say it’s worth the risk if not for commercial. In my opinion they are very good to have and can prevent or cure a infestation if used correctly. Plus they are good luck. Lol You have to make there home in your grow space. The baby ladybugs can eat 50 or more aphids/mites a day. I did a lot of research on this. 
I made a post on it too when I first found one in my tent if you want to check it out here is the link Ladybug in tent with flowering plant
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