As people become more concerned about their health and comfort, they demand higher quality lamps. Flickering lamps may cause problems such as eye fatigue, dryness and vision loss. Especially for people who work or study under lights for long periods of time, stable lighting is crucial. For some sensitive people, such as migraine sufferers and epileptics, frequent flickering lights may induce seizures. Conducting flicker tests can avoid such potential risks and provide a safe lighting environment for special populations.