Best weapons light

I just purchased a springfield xd .45 service and I was wondering what the best weapon light for it would be. I like to have a light with me at all times and will use this for my carry pistol, so it would be easier to attach a light to my weapon.

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Look at this thread: http://www.usacarry.com/forums/general-firearm-discussion/42745-what-best-rail-mount-flashlight-money.html

Streamlight TLR-1 or TRL-2.

It will be a tab bit harder to holster one of those firearms with a tactical light attached to it let alone trying to conceal it because the light makes the weapon a tad bigger.

I will try that link. Thank you. My holster has a rail attached so I would carry it off of the gun for concealed, but I mostly open carry. Was thinking about that though. Thank you for the replies.