Nice, they're sprouted. Not sure which ones which except for the fruit. Maybe you should try bringing in the air from your window, and exhaust out into another room. Just make sure to maybe filter the stuff coming into the box if it's gonna be from the window. What's the intake feel like? Can you feel a lot of air coming through? And remember, if its warm in your house, you're just bringing in warmer air into the box. I've yet to use an MH, but I read that they run slightly hotter than the HPS. If your temps hit around 84F~ during flower, you should be ok. One thing I can def think of is try not to have too many elbows in your ducting. A good trick is take a clip and pinch your ducting together. =) Good luck.
If all else fails, maybe you can dial your ballast down a bit?