BTA and Lighting

[RicePaddy]

I purchased a GBTA about two months ago. When I purchased her she was a beautiful translucent green. As time goes on she seems to be becoming a darker green. I feed her once very two to three days chunks of fresh shrimp from the local grocer. I currently have a PC that is 4x65 watts.

1) Is this normal?

2) If I had better light, ie MH say 2x150 with 2x54 T5's would it turn back to that lovely translucent green?

Any advise and experiences would be greatly apreicated.

Will