Light = Energy
Poorly lit home gyms tend to lack energy whereas a bright space with a generous amount of light is generally more inviting for exercise and can be crucial to creating just the right environment for a vigorous or energetic workout.
Natural Light is Best
Natural light coming from plenty of windows and skylights is the best source of light for a home gym. If the natural light in your home gym is only minimal or non-existent, try using good fluorescent lighting that emulates sunlight. This means that the fluorescent light bulbs should have a high color temperature of 5000K-5500K and very good color rendering of 82 or higher.