Depends on expectations, and how old it is. My father says his skx007 goes all night. I don't feel my identical skx009 does. I checked them together after equal exposure and 3 hours Ina box and they matched. If I charge mine and go to sleep my adjusted eyes can still read the lume easily before sunrise. That being said its not bright at all.
dont know the age i have to open the back and see the movement from what i know it has the stock hesilite glass and the number of the watch under the sea hoarse is 59326440 I would get it archived by omega but they do not offer it in the us
I know on the sm professionals they use a better quality lume but on the reduced I do not no what they use