I tried it on my Banana Fire Bee adult, and it was harder to see than in a hatchling, but his entire eye had a dark ruby glow. On my multigene non-BEL hatchling that was listed as 'Pos. Banana' by the seller, the entire eye glowed a distinct luminescent ruby. I also tried it on my adult Ultrafly, and even her pupil didn't glow noticeably, let alone the rest of her eye. I don't have a non-Banana hatchling to test it on for comparison. However, based on my own experience, I would say that it works on other snakes with the Banana gene.
Edited to add a photo of my Banana Fire Bee's eye under normal light - absolutely no red/ruby. Since it's just me, I can't get a photo of it backlit to show the ruby color.
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