You will be fine in that space with a procyon and very small 13w or less cool cfl (for increasing the 400-450nm blue color) and possibly a 10w halogen to finish off the full spectrum (660-720 far red and infrared for the emerson effect). Try a sog or a micro sog and cover your floor with small short bud stalks using tall skinny pots similar to DRBudgreenGenes setup, you can near 1gr per watt in good soil if done correctly. Heat will be minimal but some ventilation is needed, you can use a fan with a lux outlet thermostat to kick the fan on only when needed. For personal you cannot beat it per watt.