I agree with BuddaRoom 100%.
If I were you, I will get an 6" air cooled hood, a 600 watt eye hortilux HPS lamp (same lamp for veg and flower both). Most Important thing that I would need is fan and duct work to get some cold air in the Hood and exhaust hot air out of the house. For one light a...
By intaking the cold air from living area will cause your AC to work more and cost more in electric consumption. Apart from that everything should be fine.
I love my grinder and I am sure you will like it too if you give it a try. I grow my own but I still care how much smoke I get in my lungs. Because I have endless supply of it I have to be more conscious.
True Nepalese do that and make some killer hash but their bud taste awful. If you desire premium bud you have to cure it properly.
Three simple steps.
1) Hang dry for 10-15 days. Maintain humidity at 50-60%
2)Manicure
3) Once the bud is dry enough that the sticks will snap and not bend...
My suggestion will be to use 2 fan. One fan for the lights and one for the filter.
Example. Filter 6" flange>FAN>Outside
For Lights
8" duct Air in> T or Y>lights> outside.
This way you will run your lights in a close loop. This will provide better cooling and save CO2 as well.
Good Luck