Albino Red Cover

[Dandy]

I've got a bit of a mystery with my albino red cover discus. In normal lighting, the colour is really nice - a lovely red with a white halo. But here's the weird part: when the lights are on, it pretty much goes white. Turn them off and it's red again. I'm wondering if anyone else has seen this, Dora? Is this a common trait in albino discus?