Tritium Bar Front Sight

Got the dot, not the bar & love mine. Exspecaily at dawn & dusk.
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Do you need to shine a light on it first to get it really glowing bright?

not the same exactly but I put meprolight tritium inserts on my SN tacticals factory GRS and they glow in the dark! In a pitch black room the only thing visible is 3 little dots, but they are not noticable in daylight, just the silhouette. With the tac light on its the same thing, no glow
 
Do you need to shine a light on it first to get it really glowing bright?
No, tritium glows because of it's radioactive qualities, it doesn't have to be "charged" by holding a lamp to it.

Tritium is what they use in almost all night sights on handguns. Google search it to learn more.
 
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