H and K Trijicon P2000 HD Front Outline Night Sight Set Orange
http://www.amazon.com/gp/product/B00FJ8ZV98?tag=sukses2015-20
Trijicon HD Night Sights
Fits the HK P2000
Tritium-filled glass lamp provides superior illumination in no light or low light conditions
Green lamps are warranted for 12 years from the date of manufacture
Professional installation recommended