ILLUMINATIONBecause of their large size, wild cattle are typically kept outside where natural light is available, unless weather or other conditions dictate otherwise. When kept indoors for extended periods of time, skylights, fluorescent or incandescent lights are acceptable until the animals can be allowed outside again. Wild cattle may be diurnal, crepuscular or nocturnal in nature and have no specific lighting requirements, nor are their breeding habits associated with photoperiod length. They are best maintained on a 12 hour/12 hour light-dark schedule.