Hi Allan,
If you are using drawing/tracer LED panels (like this one:
https://www.amazon.com.au/Ultra-Thin...s%2C233&sr=8-6), they are not really meant for astronomy purposes, hence they are a bit brighter as you have found. One way to reduce brightness is to use something semi-transparent between the panel and your scope. Some people use white t-shirts or sheets of paper to effectively reduce the brightness.