A proposal for the low persistance brightness tradeoff

Do you mean Bloom effects and such? I imagine that could be helpful to increase the apparent brightness of bright areas.
But it won't help with the intensity of the highlights if they are somewhat large.

This is particularly noticeable if you look at the desklamp in the runtime configuration demo. It's just not bright enough so the lightbulb looks like it's just tinted in bright yellow instead of being lit.