Doesn't seem to be much point if you have to throw in a 10 mS delay. But I suppose that's what the question is about.
In any case, isn't that over-egging the pudding? For a VU-meter, your eyes don't need the extra speed do they?
You are right, but I'm just interested why I/one need(s) the delay!
Well, it's not is it? You are really saying that if you send one number it works, and if you send a different number it doesn't? This sounds electrical to me. Like, the higher brightness is consuming too much power, and reducing the operation of something else.
You might be right, I will check this!
-Thanks!