I have been using good knight from a couple of weeks. As I have been using it I came to notice that the normal mode is ok but the activ+ mode is harmful as the ascence created around it while using was making headache. Firstly I thought that it could be due to some other reasons.
But one day after when headache strook second time I understood that the active+ mode isnt safe.
But I must say for killing mosquitos it is effective.
Normal mode is safe but not much effective in its purpose.