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Hi Pete, The Xray sights are better. The Siglights are just 3 dot glow.

"Sig Sauer's Electro-Optics division is rolling out their new X-RAY pistol sights. They're a 3-dot tritium system, but these tritium inserts maintain a clean white color in daylight. You may have already seen them on Sig's Legion series of handguns. The front sight is a green donut made from flourescent polymer with a distinctly smaller tritium dot in the center, while the rear white dots illuminate in low light."

"Sig Sauer's Electro-Optics division is rolling out their new X-RAY pistol sights. They're a 3-dot tritium system, but these tritium inserts maintain a clean white color in daylight. You may have already seen them on Sig's Legion series of handguns. The front sight is a green donut made from flourescent polymer with a distinctly smaller tritium dot in the center, while the rear white dots illuminate in low light."

Pete, the difference is that the X-RAY 3 Sights have a much cleaner/crisper glow outline for super clear glow dot contrast over the SigLite Night Sights.

Hi Pete, the difference is that the X-RAY 3 Sights have a much cleaner/crisper glow outline for super clear glow dot contrast over the SigLite Night Sights.

"Sig Sauer's Electro-Optics division is rolling out their new X-RAY pistol sights. They're a 3-dot tritium system, but these tritium inserts maintain a clean white color in daylight. You may have already seen them on Sig's Legion series of handguns. The front sight is a green donut made from flourescent polymer with a distinctly smaller tritium dot in the center, while the rear white dots illuminate in low light."