Replacing front panel of lightbox

[yeocolin]

Hi,
I just realised that the viewing panel of my lightbox has turned less white. Could this be because the screen panel has become oxidised?

Is there anyway I can replace it myself? Thanks in advance.

Regards.

 

[Jayson]

it's the plastic Aging due to the UV light from flouro tubes/sunlight

 

[yeocolin]

Thanks. So, is there anyway I can replace the plastic? If so, where can I buy it from? Art friend??