Guaranteed you'll react to the light better after practice. Like Monty says, the number doesn't really matter. When you can hit the pro and full tree with the same roll out you're in the ballpark. As you practice you'll get quicker until eventually you level out. Then adjust the car accordingly when you get to the track. It helped me tighten up my best to worse R/T's at the track by about 50. Also those random .060-.090 R/T are gone. I foot brake so the button is not at all like the car, still helps.
Doug

Another thing about the practice tree is the button I'm leaning towards adding a brake so need to get use to that

As mentioned earlier, the actual numbers are not as important as consistency. After a while, you can adjust the practice tree closer to what you get reacting to an actual tree. But the practice does help develop a rhythm that usually translates to the real world. I've seen the difference in my consistency on the track after practicing, even though I footbrake but practice with a button!

There are places that vary from lane to lane, track to track and timing systems used as well! (Ask Beard.) Even rubber build-up and/or "crown" in the track surface can affect rollout. "You" have to get consistent and somewhat predictable first. Then you will be able to start making mechanical adjustments to the car to compensate for the changes between lanes/tracks. (and adjust the practice tree for representative RT's.) I've run anywhere from 25 lbs to 50 lbs of air in my front tires between certain tracks! Then there is always stage/launch rpm's, bumping, etc.