I used a Trijicon front sight only. If you are trying to get accurate sighted fire in dim enough light that you need a tritium rear sight, the target should be illuminated. I don't think you'll find two dots on either side of the aperture on the rear sight overly helpful since it's fairly easy to find the front in the rear sight aperture if the front sight is tritium. Just my experience.
"People live too long, dogs don't live long enough" - FTF Member-