What are Budweiser red lights?

There's no official thing called "Budweiser red lights." It's possible you're thinking of one of the following:

* The Budweiser Clydesdale horses: These iconic horses often wear red blinkers or lights on their harnesses, especially when appearing in parades or events. This could be what you're thinking of.

* Red lights in a Budweiser commercial: The brand has been known to use red lighting effects in commercials, perhaps for a dramatic or festive effect.

* A local or regional custom: It's possible there's a specific local or regional tradition or event associated with Budweiser and red lights, but it's not a common practice widely known.

Can you provide more context or details?

For example:

* Where did you hear about "Budweiser red lights"?

* What is the context of this term?

* What do you think "Budweiser red lights" might be?

With more information, I can help you figure out what you're looking for.