Another might look forward to unwinding evenings with his feathered charges. In this case the lights would be set to go on late in the morning or early in the afternoon. If no natural light is used the seasons are totally under control. Several breeding seasons a year are possible. In an extreme case, five clutches were obtained in one year form a pair of Scarlet Macaws through the intensive manipulation of the lighting schedule.
Electronic timers are available that allow lights to be adjusted to a precise minute.
These electronic control centers can also be purchased as programs for personal computers. All these devices can be used to gradually dim or brighten incandescent lights. This is great for imitating the sunrise or sunset. The main fluorescent lights can only be turned on or off. Incandescent lights are used as night lights.