In low light conditions we have found (on hundreds of night firing problems) that white dots or white line sights are useful in any low light situation where it is safe to fire. What is the advantage of aligning your sights when your target is invisible? Also, we found that certain shooters complained that the brightest kind of luminous sights deteriorated their night vision.
Luminous sights do not illiminate the target. It is my opinion (and that of many other instructors) that a good Mag Light is worth all of the luminous sights in the junk drawer. Not only does a flashlight, properly used, illuminate the target, allowing identification, but spill light illuminates the sights.
So, my advice is: Try a pair of luminous sights before you buy a set for your pistol. Then try a set of white dots in the same level of illumination and finally, try a good flashlight. The average pair of luminous sights is only good for 5 years before it must be replaced. A good flashlight will last a lifetime and has all kinds of other uses...and it costs a whole lot less than a set of luminous sights.Finally, I must admit that some expert shooters were found to have about a 2% increase in accuracy UNDER SPECIFIC CONDITIONS. But, after a few years most have reverted to the flashlight. So, this is a very subjective matter and cannot be resolved by talking, only by testing and personally evaluating the product under actual conditions.