dakarm34 said:
TIR behind tint, LINs if not behind tint.
I've never seen a 10-75 bracket mounted in such a way that it was behind tint. so while the above statement is generally true, it doesn't address the horizontal vs. vertical issue. if you want my two cents, neither are the best choice for vertical mounting. they both spread their light pattern into a wide oval shape. the LIN's even moreso with a nice even spread, and the
TIR with hotspots and then a lesser spread. if you rotate the light-head 90 degrees now the oval is a TALL oval. ok, maybe blinding ants and airplanes is a bit of an exaggeration, but it makes the point. when you go off-axis on a wide oval, you're still in the beam pattern. when you go off-axis on a tall oval, it doesn't take much for you to be out of the beam pattern. people will say you can still see the lights, yeah sure, you can "see" them from almost any angle, but the light output is much reduced. a good option would be the
TIR's that have the vertically oriented fluted lens that are made to do exactly what you want. if you don't want to get those, then i would choose the regular
TIR's.
just noticed a video that illustrates my point...
http://www.youtube.com/watch?v=hC9wUeA2wT8
first let me say, i LOVE this truck and install. now look at the viper ext's mounted on the pushbar on 45 degree brackets. notice the bright vertically oriented line they draw on the pavement. stand in front of that and they're as bright as they are designed to be. step off to either side and light output drops dramatically.