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.‎