I'm new to owning this 2003 Thunderbird. Some of my previous vehicles, I've been able to swap out the old incandescent light bulbs with LEDs to brighten up the instrument gauges. Does anyone know if that is possible for the 2003 Ford Thunderbird instrument cluster? I've seen conflicting info, but have heard it is a sealed unit and bulbs can not be replaced. Does anyone know, and if so, has anyone replaced bulbs with LEDs?