1 YEAR AGO I BOUGHT THIS TOP FOR MY AQUARIUM AND THE LIGHT SHINE INTO THE AQUARIUM IS WHITE.
NO IT YELLOW ,THE LIGHT BULB WORK FINE ,SO I DINT CHANGE THE LIGHT BULB,BUT Y IT CHANGE COLOR?
1ST BEFORE
2ND NOW
The older a bulb is, the light output changes. It no longer produces the short wavelength 'white light' and instead produces long wavelength yellow light. Just change the bulb if it's a problem for you.