You've got the Reef Bright model. Follow the KISS principle and check that you have power coming out of the switch to the white LED
Based on how the fixture functions, I'm guessing that the power switch is a three-position switch where you've got white light if it's toggled one way, blue light if it's toggled the opposite, and off in the intermediate position. If that's true, there should be two power connections coming off the switch. Check for AC
voltage on the white LED
side of the switch.
I'd still take it back if it's under warranty, especially after seeing that price tag.