I'm in the market for nightsights for both my 239 and my 245. Considering how much time these two guns spend on the indoor range, I am looking for the best nightsights fot that purpose. I have read that Meprolights have larger tritium lamps and white surrounds in comparison to the Trijicons. Does this mean the overall site blade is `thinner' on the Trijicons compared to the Mepros? My preference on targets is for a thinner blade, but a bigger lamp and surround (like I have been told Meprolights have) does not necessarily translate into a bigger front sight blade. A little input here would be much appreciated!