Don't apologize for asking questions, that's EXACTLY what these forums were created for!
I don't keep them myself, but from what I understand that is a good gradient you are providing. Hopefully someone will confirm or correct that statement

How are you measuring the temperatures? Make sure you are measuring the surface temperatures rather than the air temps. Stick on thermometers aren't very useful for reptiles. Temp guns or digital thermometers (with probe) are the way to go.