I have an eight pot setup, with 400 watts HPS in my house, climate controlled at 72 degrees.
Most people dont realize the importance of air circulation when gardening indoors.
Fans blowing directly on or above the plants will have numerous benificial results. By circulating, and exchanging the air you will have more natural co2 coming into contact with your plant, helping them grow vigorouslly. You're also less likely to have hot spots of air in your growing area, and have a more consistent overall temperature. Feel free to contact me on this or any hydroponic topic if you would like to discuss in more detail. I have an eight pot setup, with 400 watts HPS in my house, climate controlled at 72 degrees.