Well here is what a pot of Green Light looked like earlier today, although the photograph was taken as a record of development rather than to show it off to best effect. You can see the green tip on the outer of the flower that has dropped and the colour of the leaves. Having both these features on the same snowdrop makes it unique.
Hmm the description says:
"The first green-tipped, green-leaved snowdrop, an amazing combination." - Well you may or may not be amazed but I think it's the only one of its kind.
"The amount of green tipping can vary from season to season." - True, there is always some green tipping but the one in the photograph is about as strong as it gets.
"Medium vigour and mid-season. Discovered in the Cambridge area a few years ago." - I'm pretty sure that pot started with a single bulb in 2009 so at the moment that one's in vigour-overdrive! It is also on the early side of typical nivalis snowdrops.