What is your use case?
If you’re trying to highlight something, maybe try a SelectionBox, which is always bright.
They’re bullets, not trying to highlight anything, just don’t think it should be occasionally dark
BoxHandleAdornments were never affected by lighting before. This is a bug. SelectionBoxes are weak in the sense that they don’t have a CFrame property meaning you have to use a part for every single box instead of using a single part and then multiple BoxHandleAdornments attached to that, so they’re not a good enough replacement.
SphereHandleAdornments suffer this same issue.