While looking on the internet yesterday for why it is the cells seem to glow, I stumbled across the dyes that are used in staining the cells to give them the 'luminescent' look. With them was a 'Cell Staining Simulation Tool' that allows you to add different coloured dyes to a cell. Here are my experiments with it:
Mix of blue and green:
'Orange-red' and 'far red':
'Orange-red' and green:
Just 'red - orange' :
Really magical. Hopefully a better direction than before too.