Just another reason to get Tru Glo TFO sights they work well under any light condition including total darkness as well as noon sunlight and do not need batteries they are pricey but try Amazon or Ebay, I am waiting for mine to replace some night sights that are hard to see on my S&W M&P 40 Compact all the rest of my M&P's have them already, what great sights for old eyes, and even better for those younger than myself!