seiko divers have the brightest and longest lasting lume.
while it's easy to jump to the conclusion that seiko's lumibrite >> superluminova, i feel watch lume is a function of 2 other factors, apart from the material itself:
1. size of the lume plot
2. thickness/layers of lume applied
my omega 2254.50 has very thick layers of lume until it bulges up from the hour markers, like the seiko turtle re-issue. as a result, it stores a huge amount of light energy when exposed and can rival the seiko monster. i'm sure of this as i own both.
the kickstarter GL could do with larger lume plots with thicker 3,6,9,12 numerals, bolder hour makers, and sword hands to maximise the lume. same for the bezel as well.
very tempting, but i will just have to resist. unfortunately, there's only so much wrist time in the real world.