Ona blocks. I open one up and put it by the outlet ducting whenever I open the flower tent. Neutralizes odours and makes everything smell like you're doing the laundry (...
They are looking fine... (:
Hold your hand just above the plants when you lower the light, what is comfortable for you is probably comfortable for them
The bug pictured is this I think;
https://en.wikipedia.org/wiki/Anthocoridae
It is however generally a beneficial bug....Maybe they're feeding on your pesky bug?