Over eight years and a half dozen antidepressants later I tried this device and I feel 100% normal. I’m on my fifth week with this device and it has been an absolute Godsend! Read thru all the reviews and you will get more tips on using this device. Best tip from me, if you’re sensitive to medications stick with two lights. If you use four lights it can make you feel jittery/anxious. I’m on two and I feel great! If you’re desperate this is the best move you’ll make!