This is a universal Replacement LED for all Lightbars from 18-55 inches. You can mix and match colors and lens type they are all universal it's your choice.
TIR vs Linear
TIR light pattern stands for “Total Internal Reflector”. The best way to describe the light pattern would be to compare it to a flashlight. The spread is round and narrow with a 50-degree spread of light. The strong suit for the TIR is that the light is focused and directed giving a very bright light beam. The downside is that it covers a very narrow area. So it's brighter but narrower whereas the Linear is wider but not as bright.
Linear Light pattern is best described as producing a wide angle of light generally producing 180 degrees of light. This light pattern is highly effective for covering a wider angle however since the light head is being spread over a wider angle it appears much less bright than a TIR.