Brightness is such enough even no other lighting fixtures need the LED color will change gradually and automatically, this item will change its color by detecting water temperature when water flows down, the LED will light instantly and automatically, when water temperature is lower 32 centigrade green color will show automatically and between 33 ~41 centigrade blue color will show automatically and between 42~50 centigrade red color will show automatically finally when water temperature is above 50 centigrade red color will flash immediately.