The hood is made from 6mm PVC sheet, inside/outside self adh. vinyl plus aluminium mirrors from celling light tube fitting, standard Arcadia T5 leads, electronic OSRAM T5 light tube ballasts, cable glands (other small bits and pieces).
I designed the hood to have sort of collar inside, and prevent condensation drip outside the tank.
As you can see project is slightly different to execution but general idea stayed the same.
BTW I don't know how to add better quality jpeg with autocad drawing but hopefully you'll see what is all about.