I posted this before but figured this is a good thread to post it again...
The above are Ameriglo TCAP LE sights which have a tritium insert as well as luminescent paint. They were designed specifically for those LEOs who start in sunlight and end up in a dark house, and in my experience the lume front sight ends up glowing way more than the tritium does for first five minutes.
I don't know about other lume's and fiberoptics sights mixing, but this particular setup works really well, even at night with a quick flashlight charge.