With Mars in strong opposition with natal Sun, you have so much sheer energy at your disposal that you may need to work it off for this brief period of time in some form of physical activity, like sports or exercise. The abundant energy of Mars comes into your conscious awareness, and you are very impatient to get things done in a hurry. There can be great tension during this transit, and also great progress toward your goals if you can contain the energy.
With Mars in Gemini, business ideas also come into mind and with all of the energy you have, you may want to put that energy into a productive movement towards making money, or planning for your future. You are filled with a vast amount of ideas and you may want to implement them all at the same time. Balance this energy with a yellow candle, so that you can prioritize and focus on the ideas that will benefit you first.
Lighting yellow on a waxing moon also helps with concentration, memory and can bring bursts of joy, which is always welcome!