hi bro the top (+) and bottom (-) switch controls the brightness. The button on the left controls the white light while the right controls the blue light. the middle button switches on and off the lightset
picture reference from : http://www.ultimatereef.net/forums/s...d.php?t=484419
To increase the white light, first press the "O" button and then press the + and - button to dim.
To increase the blue light press the " half moon" button logo on the right then the + and - respectively.
Hope it helps!