Wicked tip for ppl having troubles with pests

Ladybugs are known to be pest removers, safe to use, and easy to contain. I grow indoors and I usually let my plant on the window still from 6pm - 8am with lights on it from lamps. By allowing fresh outside air, to my amazement a lady came onto my plant and starting scoping around. Then 40min later another came to my plant!

I think ladybugs are naturally attracted to marijuana plants as they are a reliable source of pests.

Then call me a ladybug.

Do Ladybugs eat little sandflys? since theres a crack in my wardrobe quite a bit of light seeps out and those small sandflys are attracted to the light and go on my plants and make little holes in them... and how do i catch them? lol