I don't have a Luminox but I have a few tritium watches( Ball and a GSAR). Any tritium watch will not be bright in the daylight, even when you cover it. In fact, until your eyes start to adjust to the darkness they don't appear bright. But, where the truly shine, sorry for the pun, is at night long after any light charged lum would have faded, the tritium continue to glow bright consistently. I've used mine as a light source while out in the dark night, they caste quite a glow. You wake up at 4 am and check your watch with lum and you're not going to see what time it is, check your tritium and you'll practically need to squint.