Yes, it is!!
You race .400 Pro tree in Super Comp, right? Do you know when the yellow is coming on? The answer is no! You are reacting to the flash of the yellow bulbs! Your personal reaction plus your car's reaction time (roll-out) is your total reaction time.
Exactly the same as it does on 3-amber Pro Tree! If you react to the instant green the same as the flash of the ambers, and you're a .000 RT player on the .400 Pro tree then you should be a .400 RT player on the instant green!
Kathy,
Do the simple math and compare...
Let's say your personal reaction time .160 and your vehicle reaction time is .225, for a total reaction time of .385. You add .025 to your delay box for a .410 RT, or .010 on your time slip... okay!?
On a .400 Pro Tree you are reacting to the flash of the 3 amber bulbs. Because because there is a .400 of second delay between the flash of the ambers and the green light, the timing systems only sees the .010 difference between the green light coming on and you leaving the line.
Now, on an instant green tree, you are reacting to the flash of the green lamp. Because there is no delay in the clocks starting, the timing system sees the .410 that it took for you to leave the line!
Am I making it clear or do you still not understand?