Supplemental lighting should be used to brighten walls. This gets rid of the gloomy feeling caused by indirect lighting. The ability to control the light source is very important, especially in a mixed use situation. Multiple switches and dimming control systems are two popular choices. Natural light can be an advantage or disadvantage to the training situation.
Natural light has a great effect on the morale and boredom threshold of trainees.
Some experts believe windows create a distraction to the training process. Sunlight is unpredictable and can cause glare and unwanted heat. A good compromise is to place windows higher in the room, blocking distracting views yet allowing sunlight to enter the room. The two main objectives of training room acoustics are to maintain speaker clarity and to keep random noise to a minimum. Avoid positioning the training room near highways, crosswalks or high traffic areas.