Flickering radio lights.

After I installed my PIAA 510 lights, the radio display flickers when I turn on my lights. The radio works absolutely fine. It's not low current or anyhting like that, because it happens if I turnon only hte parking lights, no other lights are on. It doesn't matter if I turn on all other electric accessories, or turn them all off. Doesn't change with RPM or anything. Any explanations. No other electrical problems anywhere else with any electrical part.. All other dash lights are fine. Please help.