Well, I can't really tell you, as I had 4 bulbs burned out before. It isn't as bright as the radio lights, but is brighter then having more then half the bulbs burned out.

As I said, I replaced one bulb first to compare the brightness and didn't see any difference.

The LEDs are running close to their full output as they are in the flashlight. If you have one of these very common flashlights, you know how bright they are.

If I turn the dimmer switch off, then back up one notch to the lowest setting, the HVAC is just as visible as the radio, so they they are not under powered.