Which is brighter, A K2 or LUX5?

[woodrow]

I got the new Inova T3 with the K2 led. I was at Sportsman's Warehouse last night and I asked to look at a SF L4 to compare it to the T3 I had with me. The T3 had the more intense spot (from 6" and when shined on the ceiling at about 10') but the L4 had the brighter sidespill-at least up close.

I believe I remembering that the new T3 has a 5.something K2 led in it. Are the LUX 5 pretty close in output to the K2's, or can one be driven harder than the other?