2 1/2 feet lower but with downlight installed less direct glare. Other choices for low ceiling are lights that are installed on the far ends of the walls that shine upwards to the ceiling giving that romantic exotic feel. Add also shade or stand lamps and your living room will look spacious.

Make sure you dont have high back furniture. Low sleek ones will be perfect. Make sure your walls are light or patel colored and not dark - making the ceiling even lower. Play with colors of your feng shui compatibility.