black fly

Hi Guys Firstly Im new here so Hi to all fellow growers Ok I have recently changed all my lighting to the new specific wavelength Chinese LED things. The lights are made up of blue and red LEDs. where I had a 400W sox (sodium) light I have replaced witha 300W Led light. My problem is...

I have a quick question. I have these tiny little flying black insects I think are messing with my plants. I also see them flying around my house. Any ideas????? Also I have yellowing middle leaves with brown edges that end up falling off. . Any ideas??