Yang energy is considered masculine. Yang is very expanding, active, energetic, outward, and lighter (less dense). Unlike yin, yang is fast moving and expands outward. Some common properties of yang include:
An environment with an abundance of yang might have high ceilings with lots of windows that bath everything in sun. Yang spaces are usually very large with minimal furnishings that are very angular. Environments with a lot of yang tend to feel very expansive, open and bright.
If you need to add more yin energy to your space, then choose soft, upholstered furniture that is heavy and low to the ground. Select rich, dark colors and soft lighting. You can also bring in rounded window treatments, area rugs, and throw pillows to add that soft nurturing quality often associated with yin.
Your home has too little yang if you have any of the following symptoms: lack leadership; low productivity; indecisive; depressed or overly emotional; controlling; overly introverted; hold on to things too long; or stagnant energy.
If you need more yang energy, add bright colors and lighting (especially uplights). You can even remove your curtains and let the sunlight stream in. Include furniture and accessories that have smooth and/or glossy surfaces. You may also want to use lightweight furniture and pick stuff up off of the floor.
As always, it is most important to balance yin and yang—people are always much happier in balanced environments.
"Whatever the mind can conceive and believe the mind can achieve." - Napoleon Hill